Finding the Fourth Proportional to 1,187,158,618.45, 1,638,272,858.61 and 658,517,131.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,187,158,618.45 : 1,638,272,858.61 = 658,517,131.54 : x
2. Step 2: Convert to fraction form
   1,187,158,618.45/1,638,272,858.61 = 658,517,131.54/x
3. Step 3: Cross multiply
   1,187,158,618.45x = 1,638,272,858.61 × 658,517,131.54
4. Step 4: Simplify right side
   1,187,158,618.45x = 1,078,830,743,531,693,056
5. Step 5: Solve for x
   x = 1,078,830,743,531,693,056/1,187,158,618.45
6. Step 6: Final answer
   x = 908,750,293.99