Finding the Fourth Proportional to 1,060.51, 1,462.64 and 640.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.51 : 1,462.64 = 640.83 : x
2. Step 2: Convert to fraction form
   1,060.51/1,462.64 = 640.83/x
3. Step 3: Cross multiply
   1,060.51x = 1,462.64 × 640.83
4. Step 4: Simplify right side
   1,060.51x = 937,300.39
5. Step 5: Solve for x
   x = 937,300.39/1,060.51
6. Step 6: Final answer
   x = 883.82