Finding the Fourth Proportional to 127,820.88, 191,664.17 and 56,712.72

Step by Step Solution

1. Step 1: Write the proportion equation
   127,820.88 : 191,664.17 = 56,712.72 : x
2. Step 2: Convert to fraction form
   127,820.88/191,664.17 = 56,712.72/x
3. Step 3: Cross multiply
   127,820.88x = 191,664.17 × 56,712.72
4. Step 4: Simplify right side
   127,820.88x = 10,869,796,123.68
5. Step 5: Solve for x
   x = 10,869,796,123.68/127,820.88
6. Step 6: Final answer
   x = 85,039.28