Finding the Fourth Proportional to 961,816.80, 1,327,068.72 and 621,876

Step by Step Solution

1. Step 1: Write the proportion equation
   961,816.80 : 1,327,068.72 = 621,876 : x
2. Step 2: Convert to fraction form
   961,816.80/1,327,068.72 = 621,876/x
3. Step 3: Cross multiply
   961,816.80x = 1,327,068.72 × 621,876
4. Step 4: Simplify right side
   961,816.80x = 825,272,187,318.72
5. Step 5: Solve for x
   x = 825,272,187,318.72/961,816.80
6. Step 6: Final answer
   x = 858,034.70