Finding the Fourth Proportional to 1,066.30, 1,471.30 and 624.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.30 : 1,471.30 = 624.21 : x
2. Step 2: Convert to fraction form
   1,066.30/1,471.30 = 624.21/x
3. Step 3: Cross multiply
   1,066.30x = 1,471.30 × 624.21
4. Step 4: Simplify right side
   1,066.30x = 918,393.10
5. Step 5: Solve for x
   x = 918,393.10/1,066.30
6. Step 6: Final answer
   x = 861.29