Finding the Fourth Proportional to 1,060.17, 1,462.59 and 640.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.17 : 1,462.59 = 640.53 : x
2. Step 2: Convert to fraction form
   1,060.17/1,462.59 = 640.53/x
3. Step 3: Cross multiply
   1,060.17x = 1,462.59 × 640.53
4. Step 4: Simplify right side
   1,060.17x = 936,832.77
5. Step 5: Solve for x
   x = 936,832.77/1,060.17
6. Step 6: Final answer
   x = 883.66