Finding the Fourth Proportional to 151,257,427.59, 208,831,796.57 and 123,446,578.78

Step by Step Solution

1. Step 1: Write the proportion equation
   151,257,427.59 : 208,831,796.57 = 123,446,578.78 : x
2. Step 2: Convert to fraction form
   151,257,427.59/208,831,796.57 = 123,446,578.78/x
3. Step 3: Cross multiply
   151,257,427.59x = 208,831,796.57 × 123,446,578.78
4. Step 4: Simplify right side
   151,257,427.59x = 25,779,570,826,833,976
5. Step 5: Solve for x
   x = 25,779,570,826,833,976/151,257,427.59
6. Step 6: Final answer
   x = 170,435,073.75