Finding the Fourth Proportional to 1,113.23, 1,667.70 and 624.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.23 : 1,667.70 = 624.80 : x
2. Step 2: Convert to fraction form
   1,113.23/1,667.70 = 624.80/x
3. Step 3: Cross multiply
   1,113.23x = 1,667.70 × 624.80
4. Step 4: Simplify right side
   1,113.23x = 1,041,978.96
5. Step 5: Solve for x
   x = 1,041,978.96/1,113.23
6. Step 6: Final answer
   x = 936.00