Finding the Fourth Proportional to 1,113.38, 1,668.72 and 626.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.38 : 1,668.72 = 626.30 : x
2. Step 2: Convert to fraction form
   1,113.38/1,668.72 = 626.30/x
3. Step 3: Cross multiply
   1,113.38x = 1,668.72 × 626.30
4. Step 4: Simplify right side
   1,113.38x = 1,045,119.34
5. Step 5: Solve for x
   x = 1,045,119.34/1,113.38
6. Step 6: Final answer
   x = 938.69