Finding the Fourth Proportional to 1,103,728.80, 1,523,151.72 and 644,870.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103,728.80 : 1,523,151.72 = 644,870.28 : x
2. Step 2: Convert to fraction form
   1,103,728.80/1,523,151.72 = 644,870.28/x
3. Step 3: Cross multiply
   1,103,728.80x = 1,523,151.72 × 644,870.28
4. Step 4: Simplify right side
   1,103,728.80x = 982,235,276,158.88
5. Step 5: Solve for x
   x = 982,235,276,158.88/1,103,728.80
6. Step 6: Final answer
   x = 889,924.48