Finding the Fourth Proportional to 127,292.10, 191,012.16 and 52,419.78

Step by Step Solution

1. Step 1: Write the proportion equation
   127,292.10 : 191,012.16 = 52,419.78 : x
2. Step 2: Convert to fraction form
   127,292.10/191,012.16 = 52,419.78/x
3. Step 3: Cross multiply
   127,292.10x = 191,012.16 × 52,419.78
4. Step 4: Simplify right side
   127,292.10x = 10,012,815,404.52
5. Step 5: Solve for x
   x = 10,012,815,404.52/127,292.10
6. Step 6: Final answer
   x = 78,660.15