Finding the Fourth Proportional to 1,301.55, 1,951.05 and 521.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,301.55 : 1,951.05 = 521.34 : x
2. Step 2: Convert to fraction form
   1,301.55/1,951.05 = 521.34/x
3. Step 3: Cross multiply
   1,301.55x = 1,951.05 × 521.34
4. Step 4: Simplify right side
   1,301.55x = 1,017,160.41
5. Step 5: Solve for x
   x = 1,017,160.41/1,301.55
6. Step 6: Final answer
   x = 781.50