Finding the Fourth Proportional to 127,656.10, 191,570.55 and 57,499.30

Step by Step Solution

1. Step 1: Write the proportion equation
   127,656.10 : 191,570.55 = 57,499.30 : x
2. Step 2: Convert to fraction form
   127,656.10/191,570.55 = 57,499.30/x
3. Step 3: Cross multiply
   127,656.10x = 191,570.55 × 57,499.30
4. Step 4: Simplify right side
   127,656.10x = 11,015,172,525.62
5. Step 5: Solve for x
   x = 11,015,172,525.62/127,656.10
6. Step 6: Final answer
   x = 86,287.87