Finding the Fourth Proportional to 1,077.54, 1,487.63 and 724.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.54 : 1,487.63 = 724.10 : x
2. Step 2: Convert to fraction form
   1,077.54/1,487.63 = 724.10/x
3. Step 3: Cross multiply
   1,077.54x = 1,487.63 × 724.10
4. Step 4: Simplify right side
   1,077.54x = 1,077,181.82
5. Step 5: Solve for x
   x = 1,077,181.82/1,077.54
6. Step 6: Final answer
   x = 999.67