Finding the Fourth Proportional to 138,978.32, 191,856.21 and 93,116.94

Step by Step Solution

1. Step 1: Write the proportion equation
   138,978.32 : 191,856.21 = 93,116.94 : x
2. Step 2: Convert to fraction form
   138,978.32/191,856.21 = 93,116.94/x
3. Step 3: Cross multiply
   138,978.32x = 191,856.21 × 93,116.94
4. Step 4: Simplify right side
   138,978.32x = 17,865,063,195.20
5. Step 5: Solve for x
   x = 17,865,063,195.20/138,978.32
6. Step 6: Final answer
   x = 128,545.68