Finding the Fourth Proportional to 113,429.24, 156,532.78 and 63,128.24

Step by Step Solution

1. Step 1: Write the proportion equation
   113,429.24 : 156,532.78 = 63,128.24 : x
2. Step 2: Convert to fraction form
   113,429.24/156,532.78 = 63,128.24/x
3. Step 3: Cross multiply
   113,429.24x = 156,532.78 × 63,128.24
4. Step 4: Simplify right side
   113,429.24x = 9,881,638,903.71
5. Step 5: Solve for x
   x = 9,881,638,903.71/113,429.24
6. Step 6: Final answer
   x = 87,117.21