Finding the Fourth Proportional to 113,109.71, 156,110.60 and 65,390.81

Step by Step Solution

1. Step 1: Write the proportion equation
   113,109.71 : 156,110.60 = 65,390.81 : x
2. Step 2: Convert to fraction form
   113,109.71/156,110.60 = 65,390.81/x
3. Step 3: Cross multiply
   113,109.71x = 156,110.60 × 65,390.81
4. Step 4: Simplify right side
   113,109.71x = 10,208,198,583.59
5. Step 5: Solve for x
   x = 10,208,198,583.59/113,109.71
6. Step 6: Final answer
   x = 90,250.42