Finding the Fourth Proportional to 408,298.32, 612,527.67 and 142,067.52

Step by Step Solution

1. Step 1: Write the proportion equation
   408,298.32 : 612,527.67 = 142,067.52 : x
2. Step 2: Convert to fraction form
   408,298.32/612,527.67 = 142,067.52/x
3. Step 3: Cross multiply
   408,298.32x = 612,527.67 × 142,067.52
4. Step 4: Simplify right side
   408,298.32x = 87,020,287,008.28
5. Step 5: Solve for x
   x = 87,020,287,008.28/408,298.32
6. Step 6: Final answer
   x = 213,129.18