Finding the Fourth Proportional to 1,863.72, 2,572.32 and 1,077.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,863.72 : 2,572.32 = 1,077.72 : x
2. Step 2: Convert to fraction form
   1,863.72/2,572.32 = 1,077.72/x
3. Step 3: Cross multiply
   1,863.72x = 2,572.32 × 1,077.72
4. Step 4: Simplify right side
   1,863.72x = 2,772,240.71
5. Step 5: Solve for x
   x = 2,772,240.71/1,863.72
6. Step 6: Final answer
   x = 1,487.48