Finding the Fourth Proportional to 92,498.52, 138,352.29 and 77,208.05

Step by Step Solution

1. Step 1: Write the proportion equation
   92,498.52 : 138,352.29 = 77,208.05 : x
2. Step 2: Convert to fraction form
   92,498.52/138,352.29 = 77,208.05/x
3. Step 3: Cross multiply
   92,498.52x = 138,352.29 × 77,208.05
4. Step 4: Simplify right side
   92,498.52x = 10,681,909,832.17
5. Step 5: Solve for x
   x = 10,681,909,832.17/92,498.52
6. Step 6: Final answer
   x = 115,481.95