Finding the Fourth Proportional to 1,060.47, 1,589.49 and 648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.47 : 1,589.49 = 648.72 : x
2. Step 2: Convert to fraction form
   1,060.47/1,589.49 = 648.72/x
3. Step 3: Cross multiply
   1,060.47x = 1,589.49 × 648.72
4. Step 4: Simplify right side
   1,060.47x = 1,031,133.95
5. Step 5: Solve for x
   x = 1,031,133.95/1,060.47
6. Step 6: Final answer
   x = 972.34