Finding the Fourth Proportional to 863,760.78, 1,191,981.98 and 476,579.76

Step by Step Solution

1. Step 1: Write the proportion equation
   863,760.78 : 1,191,981.98 = 476,579.76 : x
2. Step 2: Convert to fraction form
   863,760.78/1,191,981.98 = 476,579.76/x
3. Step 3: Cross multiply
   863,760.78x = 1,191,981.98 × 476,579.76
4. Step 4: Simplify right side
   863,760.78x = 568,074,488,374.59
5. Step 5: Solve for x
   x = 568,074,488,374.59/863,760.78
6. Step 6: Final answer
   x = 657,675.72