Finding the Fourth Proportional to 127,215.81, 175,560.62 and 72,020.52

Step by Step Solution

1. Step 1: Write the proportion equation
   127,215.81 : 175,560.62 = 72,020.52 : x
2. Step 2: Convert to fraction form
   127,215.81/175,560.62 = 72,020.52/x
3. Step 3: Cross multiply
   127,215.81x = 175,560.62 × 72,020.52
4. Step 4: Simplify right side
   127,215.81x = 12,643,966,783.82
5. Step 5: Solve for x
   x = 12,643,966,783.82/127,215.81
6. Step 6: Final answer
   x = 99,389.90