Finding the Fourth Proportional to 120,200.88, 165,726.42 and 77,104.38

Step by Step Solution

1. Step 1: Write the proportion equation
   120,200.88 : 165,726.42 = 77,104.38 : x
2. Step 2: Convert to fraction form
   120,200.88/165,726.42 = 77,104.38/x
3. Step 3: Cross multiply
   120,200.88x = 165,726.42 × 77,104.38
4. Step 4: Simplify right side
   120,200.88x = 12,778,232,863.72
5. Step 5: Solve for x
   x = 12,778,232,863.72/120,200.88
6. Step 6: Final answer
   x = 106,307.32