Finding the Fourth Proportional to 572,965.12, 789,870.72 and 402,670.72

Step by Step Solution

1. Step 1: Write the proportion equation
   572,965.12 : 789,870.72 = 402,670.72 : x
2. Step 2: Convert to fraction form
   572,965.12/789,870.72 = 402,670.72/x
3. Step 3: Cross multiply
   572,965.12x = 789,870.72 × 402,670.72
4. Step 4: Simplify right side
   572,965.12x = 318,057,811,529.32
5. Step 5: Solve for x
   x = 318,057,811,529.32/572,965.12
6. Step 6: Final answer
   x = 555,108.51