Finding the Fourth Proportional to 1,066.08, 1,471.28 and 624.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.08 : 1,471.28 = 624.12 : x
2. Step 2: Convert to fraction form
   1,066.08/1,471.28 = 624.12/x
3. Step 3: Cross multiply
   1,066.08x = 1,471.28 × 624.12
4. Step 4: Simplify right side
   1,066.08x = 918,255.27
5. Step 5: Solve for x
   x = 918,255.27/1,066.08
6. Step 6: Final answer
   x = 861.34