Finding the Fourth Proportional to 109,740.90, 151,434.59 and 64,420.73

Step by Step Solution

1. Step 1: Write the proportion equation
   109,740.90 : 151,434.59 = 64,420.73 : x
2. Step 2: Convert to fraction form
   109,740.90/151,434.59 = 64,420.73/x
3. Step 3: Cross multiply
   109,740.90x = 151,434.59 × 64,420.73
4. Step 4: Simplify right side
   109,740.90x = 9,755,525,755.77
5. Step 5: Solve for x
   x = 9,755,525,755.77/109,740.90
6. Step 6: Final answer
   x = 88,895.99