Finding the Fourth Proportional to 138,665.59, 191,342.06 and 78,232.71

Step by Step Solution

1. Step 1: Write the proportion equation
   138,665.59 : 191,342.06 = 78,232.71 : x
2. Step 2: Convert to fraction form
   138,665.59/191,342.06 = 78,232.71/x
3. Step 3: Cross multiply
   138,665.59x = 191,342.06 × 78,232.71
4. Step 4: Simplify right side
   138,665.59x = 14,969,207,075.46
5. Step 5: Solve for x
   x = 14,969,207,075.46/138,665.59
6. Step 6: Final answer
   x = 107,951.85