Finding the Fourth Proportional to 113,433.90, 156,521.26 and 65,678.02

Step by Step Solution

1. Step 1: Write the proportion equation
   113,433.90 : 156,521.26 = 65,678.02 : x
2. Step 2: Convert to fraction form
   113,433.90/156,521.26 = 65,678.02/x
3. Step 3: Cross multiply
   113,433.90x = 156,521.26 × 65,678.02
4. Step 4: Simplify right side
   113,433.90x = 10,280,006,116.32
5. Step 5: Solve for x
   x = 10,280,006,116.32/113,433.90
6. Step 6: Final answer
   x = 90,625.52