Finding the Fourth Proportional to 127,679.28, 191,488.15 and 56,562.63

Step by Step Solution

1. Step 1: Write the proportion equation
   127,679.28 : 191,488.15 = 56,562.63 : x
2. Step 2: Convert to fraction form
   127,679.28/191,488.15 = 56,562.63/x
3. Step 3: Cross multiply
   127,679.28x = 191,488.15 × 56,562.63
4. Step 4: Simplify right side
   127,679.28x = 10,831,073,377.83
5. Step 5: Solve for x
   x = 10,831,073,377.83/127,679.28
6. Step 6: Final answer
   x = 84,830.31