Finding the Fourth Proportional to 113,105.30, 156,087.90 and 64,711.76

Step by Step Solution

1. Step 1: Write the proportion equation
   113,105.30 : 156,087.90 = 64,711.76 : x
2. Step 2: Convert to fraction form
   113,105.30/156,087.90 = 64,711.76/x
3. Step 3: Cross multiply
   113,105.30x = 156,087.90 × 64,711.76
4. Step 4: Simplify right side
   113,105.30x = 10,100,721,943.26
5. Step 5: Solve for x
   x = 10,100,721,943.26/113,105.30
6. Step 6: Final answer
   x = 89,303.71