Finding the Fourth Proportional to 2,153,870.49, 2,972,341.23 and 1,187,000.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,153,870.49 : 2,972,341.23 = 1,187,000.78 : x
2. Step 2: Convert to fraction form
   2,153,870.49/2,972,341.23 = 1,187,000.78/x
3. Step 3: Cross multiply
   2,153,870.49x = 2,972,341.23 × 1,187,000.78
4. Step 4: Simplify right side
   2,153,870.49x = 3,528,171,359,181.06
5. Step 5: Solve for x
   x = 3,528,171,359,181.06/2,153,870.49
6. Step 6: Final answer
   x = 1,638,061.05