Finding the Fourth Proportional to 1,137,965.27, 1,570,500.71 and 621,797.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,137,965.27 : 1,570,500.71 = 621,797.63 : x
2. Step 2: Convert to fraction form
   1,137,965.27/1,570,500.71 = 621,797.63/x
3. Step 3: Cross multiply
   1,137,965.27x = 1,570,500.71 × 621,797.63
4. Step 4: Simplify right side
   1,137,965.27x = 976,533,608,429.83
5. Step 5: Solve for x
   x = 976,533,608,429.83/1,137,965.27
6. Step 6: Final answer
   x = 858,140.08