Finding the Fourth Proportional to 113,187.31, 156,187.74 and 67,856.87

Step by Step Solution

1. Step 1: Write the proportion equation
   113,187.31 : 156,187.74 = 67,856.87 : x
2. Step 2: Convert to fraction form
   113,187.31/156,187.74 = 67,856.87/x
3. Step 3: Cross multiply
   113,187.31x = 156,187.74 × 67,856.87
4. Step 4: Simplify right side
   113,187.31x = 10,598,411,813.71
5. Step 5: Solve for x
   x = 10,598,411,813.71/113,187.31
6. Step 6: Final answer
   x = 93,636.04