Finding the Fourth Proportional to 1,549.06, 2,322.57 and 715.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,549.06 : 2,322.57 = 715.78 : x
2. Step 2: Convert to fraction form
   1,549.06/2,322.57 = 715.78/x
3. Step 3: Cross multiply
   1,549.06x = 2,322.57 × 715.78
4. Step 4: Simplify right side
   1,549.06x = 1,662,449.15
5. Step 5: Solve for x
   x = 1,662,449.15/1,549.06
6. Step 6: Final answer
   x = 1,073.20