Finding the Fourth Proportional to 139,150.90, 191,929.25 and 127,702.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,150.90 : 191,929.25 = 127,702.78 : x
2. Step 2: Convert to fraction form
   139,150.90/191,929.25 = 127,702.78/x
3. Step 3: Cross multiply
   139,150.90x = 191,929.25 × 127,702.78
4. Step 4: Simplify right side
   139,150.90x = 24,509,898,989.02
5. Step 5: Solve for x
   x = 24,509,898,989.02/139,150.90
6. Step 6: Final answer
   x = 176,138.99