Finding the Fourth Proportional to 639,342.72, 882,288.61 and 352,862.81

Step by Step Solution

1. Step 1: Write the proportion equation
   639,342.72 : 882,288.61 = 352,862.81 : x
2. Step 2: Convert to fraction form
   639,342.72/882,288.61 = 352,862.81/x
3. Step 3: Cross multiply
   639,342.72x = 882,288.61 × 352,862.81
4. Step 4: Simplify right side
   639,342.72x = 311,326,838,155.59
5. Step 5: Solve for x
   x = 311,326,838,155.59/639,342.72
6. Step 6: Final answer
   x = 486,948.28