Finding the Fourth Proportional to 185,861.92, 256,488.78 and 100,978.24

Step by Step Solution

1. Step 1: Write the proportion equation
   185,861.92 : 256,488.78 = 100,978.24 : x
2. Step 2: Convert to fraction form
   185,861.92/256,488.78 = 100,978.24/x
3. Step 3: Cross multiply
   185,861.92x = 256,488.78 × 100,978.24
4. Step 4: Simplify right side
   185,861.92x = 25,899,785,584.15
5. Step 5: Solve for x
   x = 25,899,785,584.15/185,861.92
6. Step 6: Final answer
   x = 139,349.61