Finding the Fourth Proportional to 113,142.56, 156,119.39 and 65,386.69

Step by Step Solution

1. Step 1: Write the proportion equation
   113,142.56 : 156,119.39 = 65,386.69 : x
2. Step 2: Convert to fraction form
   113,142.56/156,119.39 = 65,386.69/x
3. Step 3: Cross multiply
   113,142.56x = 156,119.39 × 65,386.69
4. Step 4: Simplify right side
   113,142.56x = 10,208,129,829.99
5. Step 5: Solve for x
   x = 10,208,129,829.99/113,142.56
6. Step 6: Final answer
   x = 90,223.61