Finding the Fourth Proportional to 888,141.55, 1,330,681.42 and 413,854.15

Step by Step Solution

1. Step 1: Write the proportion equation
   888,141.55 : 1,330,681.42 = 413,854.15 : x
2. Step 2: Convert to fraction form
   888,141.55/1,330,681.42 = 413,854.15/x
3. Step 3: Cross multiply
   888,141.55x = 1,330,681.42 × 413,854.15
4. Step 4: Simplify right side
   888,141.55x = 550,708,027,994.89
5. Step 5: Solve for x
   x = 550,708,027,994.89/888,141.55
6. Step 6: Final answer
   x = 620,067.86