Finding the Fourth Proportional to 113,188.31, 156,189.12 and 67,857.87

Step by Step Solution

1. Step 1: Write the proportion equation
   113,188.31 : 156,189.12 = 67,857.87 : x
2. Step 2: Convert to fraction form
   113,188.31/156,189.12 = 67,857.87/x
3. Step 3: Cross multiply
   113,188.31x = 156,189.12 × 67,857.87
4. Step 4: Simplify right side
   113,188.31x = 10,598,661,000.37
5. Step 5: Solve for x
   x = 10,598,661,000.37/113,188.31
6. Step 6: Final answer
   x = 93,637.42