Finding the Fourth Proportional to 139,046.08, 191,875.88 and 78,612.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,046.08 : 191,875.88 = 78,612.88 : x
2. Step 2: Convert to fraction form
   139,046.08/191,875.88 = 78,612.88/x
3. Step 3: Cross multiply
   139,046.08x = 191,875.88 × 78,612.88
4. Step 4: Simplify right side
   139,046.08x = 15,083,915,529.33
5. Step 5: Solve for x
   x = 15,083,915,529.33/139,046.08
6. Step 6: Final answer
   x = 108,481.42