Finding the Fourth Proportional to 77,139.89, 115,755.81 and 34,442.00

Step by Step Solution

1. Step 1: Write the proportion equation
   77,139.89 : 115,755.81 = 34,442.00 : x
2. Step 2: Convert to fraction form
   77,139.89/115,755.81 = 34,442.00/x
3. Step 3: Cross multiply
   77,139.89x = 115,755.81 × 34,442.00
4. Step 4: Simplify right side
   77,139.89x = 3,986,861,029.24
5. Step 5: Solve for x
   x = 3,986,861,029.24/77,139.89
6. Step 6: Final answer
   x = 51,683.52