Finding the Fourth Proportional to 113,145.98, 156,124.11 and 65,390.12

Step by Step Solution

1. Step 1: Write the proportion equation
   113,145.98 : 156,124.11 = 65,390.12 : x
2. Step 2: Convert to fraction form
   113,145.98/156,124.11 = 65,390.12/x
3. Step 3: Cross multiply
   113,145.98x = 156,124.11 × 65,390.12
4. Step 4: Simplify right side
   113,145.98x = 10,208,974,287.79
5. Step 5: Solve for x
   x = 10,208,974,287.79/113,145.98
6. Step 6: Final answer
   x = 90,228.34