Finding the Fourth Proportional to 113,421.50, 156,521.76 and 65,677.40

Step by Step Solution

1. Step 1: Write the proportion equation
   113,421.50 : 156,521.76 = 65,677.40 : x
2. Step 2: Convert to fraction form
   113,421.50/156,521.76 = 65,677.40/x
3. Step 3: Cross multiply
   113,421.50x = 156,521.76 × 65,677.40
4. Step 4: Simplify right side
   113,421.50x = 10,279,942,240.22
5. Step 5: Solve for x
   x = 10,279,942,240.22/113,421.50
6. Step 6: Final answer
   x = 90,634.86