Finding the Fourth Proportional to 1,807.20, 2,493.96 and 1,061.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.20 : 2,493.96 = 1,061.72 : x
2. Step 2: Convert to fraction form
   1,807.20/2,493.96 = 1,061.72/x
3. Step 3: Cross multiply
   1,807.20x = 2,493.96 × 1,061.72
4. Step 4: Simplify right side
   1,807.20x = 2,647,887.21
5. Step 5: Solve for x
   x = 2,647,887.21/1,807.20
6. Step 6: Final answer
   x = 1,465.19