Finding the Fourth Proportional to 1,034.13, 1,426.91 and 641.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.13 : 1,426.91 = 641.25 : x
2. Step 2: Convert to fraction form
   1,034.13/1,426.91 = 641.25/x
3. Step 3: Cross multiply
   1,034.13x = 1,426.91 × 641.25
4. Step 4: Simplify right side
   1,034.13x = 915,002.83
5. Step 5: Solve for x
   x = 915,002.83/1,034.13
6. Step 6: Final answer
   x = 884.80