Finding the Fourth Proportional to 807,061.68, 1,113,851.76 and 521,412.72

Step by Step Solution

1. Step 1: Write the proportion equation
   807,061.68 : 1,113,851.76 = 521,412.72 : x
2. Step 2: Convert to fraction form
   807,061.68/1,113,851.76 = 521,412.72/x
3. Step 3: Cross multiply
   807,061.68x = 1,113,851.76 × 521,412.72
4. Step 4: Simplify right side
   807,061.68x = 580,776,475,858.39
5. Step 5: Solve for x
   x = 580,776,475,858.39/807,061.68
6. Step 6: Final answer
   x = 719,618.45