Finding the Fourth Proportional to 127,680.72, 191,513.88 and 56,582.88

Step by Step Solution

1. Step 1: Write the proportion equation
   127,680.72 : 191,513.88 = 56,582.88 : x
2. Step 2: Convert to fraction form
   127,680.72/191,513.88 = 56,582.88/x
3. Step 3: Cross multiply
   127,680.72x = 191,513.88 × 56,582.88
4. Step 4: Simplify right side
   127,680.72x = 10,836,406,890.37
5. Step 5: Solve for x
   x = 10,836,406,890.37/127,680.72
6. Step 6: Final answer
   x = 84,871.13