Finding the Fourth Proportional to 1,045.02, 1,442.01 and 646.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.02 : 1,442.01 = 646.50 : x
2. Step 2: Convert to fraction form
   1,045.02/1,442.01 = 646.50/x
3. Step 3: Cross multiply
   1,045.02x = 1,442.01 × 646.50
4. Step 4: Simplify right side
   1,045.02x = 932,259.47
5. Step 5: Solve for x
   x = 932,259.47/1,045.02
6. Step 6: Final answer
   x = 892.10