Finding the Fourth Proportional to 1,060.88, 1,590.20 and 718.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.88 : 1,590.20 = 718.16 : x
2. Step 2: Convert to fraction form
   1,060.88/1,590.20 = 718.16/x
3. Step 3: Cross multiply
   1,060.88x = 1,590.20 × 718.16
4. Step 4: Simplify right side
   1,060.88x = 1,142,018.03
5. Step 5: Solve for x
   x = 1,142,018.03/1,060.88
6. Step 6: Final answer
   x = 1,076.48