Finding the Fourth Proportional to 1,525.20, 2,105.64 and 1,002.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.20 : 2,105.64 = 1,002.72 : x
2. Step 2: Convert to fraction form
   1,525.20/2,105.64 = 1,002.72/x
3. Step 3: Cross multiply
   1,525.20x = 2,105.64 × 1,002.72
4. Step 4: Simplify right side
   1,525.20x = 2,111,367.34
5. Step 5: Solve for x
   x = 2,111,367.34/1,525.20
6. Step 6: Final answer
   x = 1,384.32