Finding the Fourth Proportional to 819,670.96, 1,131,150.78 and 457,117.72

Step by Step Solution

1. Step 1: Write the proportion equation
   819,670.96 : 1,131,150.78 = 457,117.72 : x
2. Step 2: Convert to fraction form
   819,670.96/1,131,150.78 = 457,117.72/x
3. Step 3: Cross multiply
   819,670.96x = 1,131,150.78 × 457,117.72
4. Step 4: Simplify right side
   819,670.96x = 517,069,065,529.82
5. Step 5: Solve for x
   x = 517,069,065,529.82/819,670.96
6. Step 6: Final answer
   x = 630,825.16