Finding the Fourth Proportional to 127,200.30, 190,674.90 and 71,067.30

Step by Step Solution

1. Step 1: Write the proportion equation
   127,200.30 : 190,674.90 = 71,067.30 : x
2. Step 2: Convert to fraction form
   127,200.30/190,674.90 = 71,067.30/x
3. Step 3: Cross multiply
   127,200.30x = 190,674.90 × 71,067.30
4. Step 4: Simplify right side
   127,200.30x = 13,550,750,320.77
5. Step 5: Solve for x
   x = 13,550,750,320.77/127,200.30
6. Step 6: Final answer
   x = 106,530.80