Finding the Fourth Proportional to 1,522.21, 2,100.87 and 932.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,522.21 : 2,100.87 = 932.80 : x
2. Step 2: Convert to fraction form
   1,522.21/2,100.87 = 932.80/x
3. Step 3: Cross multiply
   1,522.21x = 2,100.87 × 932.80
4. Step 4: Simplify right side
   1,522.21x = 1,959,691.54
5. Step 5: Solve for x
   x = 1,959,691.54/1,522.21
6. Step 6: Final answer
   x = 1,287.40