Finding the Fourth Proportional to 442,090.89, 663,265.71 and 142,565.46

Step by Step Solution

1. Step 1: Write the proportion equation
   442,090.89 : 663,265.71 = 142,565.46 : x
2. Step 2: Convert to fraction form
   442,090.89/663,265.71 = 142,565.46/x
3. Step 3: Cross multiply
   442,090.89x = 663,265.71 × 142,565.46
4. Step 4: Simplify right side
   442,090.89x = 94,558,781,048.38
5. Step 5: Solve for x
   x = 94,558,781,048.38/442,090.89
6. Step 6: Final answer
   x = 213,889.91