Finding the Fourth Proportional to 127,128, 175,468.88 and 86,858.04

Step by Step Solution

1. Step 1: Write the proportion equation
   127,128 : 175,468.88 = 86,858.04 : x
2. Step 2: Convert to fraction form
   127,128/175,468.88 = 86,858.04/x
3. Step 3: Cross multiply
   127,128x = 175,468.88 × 86,858.04
4. Step 4: Simplify right side
   127,128x = 15,240,882,997.80
5. Step 5: Solve for x
   x = 15,240,882,997.80/127,128
6. Step 6: Final answer
   x = 119,886.12