Finding the Fourth Proportional to 1,374.32, 2,060.72 and 724.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,374.32 : 2,060.72 = 724.88 : x
2. Step 2: Convert to fraction form
   1,374.32/2,060.72 = 724.88/x
3. Step 3: Cross multiply
   1,374.32x = 2,060.72 × 724.88
4. Step 4: Simplify right side
   1,374.32x = 1,493,774.71
5. Step 5: Solve for x
   x = 1,493,774.71/1,374.32
6. Step 6: Final answer
   x = 1,086.92