Finding the Fourth Proportional to 1,060.32, 1,588.18 and 648.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.32 : 1,588.18 = 648.21 : x
2. Step 2: Convert to fraction form
   1,060.32/1,588.18 = 648.21/x
3. Step 3: Cross multiply
   1,060.32x = 1,588.18 × 648.21
4. Step 4: Simplify right side
   1,060.32x = 1,029,477.06
5. Step 5: Solve for x
   x = 1,029,477.06/1,060.32
6. Step 6: Final answer
   x = 970.91