Finding the Fourth Proportional to 109,742.15, 151,436.31 and 64,421.98

Step by Step Solution

1. Step 1: Write the proportion equation
   109,742.15 : 151,436.31 = 64,421.98 : x
2. Step 2: Convert to fraction form
   109,742.15/151,436.31 = 64,421.98/x
3. Step 3: Cross multiply
   109,742.15x = 151,436.31 × 64,421.98
4. Step 4: Simplify right side
   109,742.15x = 9,755,826,934.09
5. Step 5: Solve for x
   x = 9,755,826,934.09/109,742.15
6. Step 6: Final answer
   x = 88,897.72