Finding the Fourth Proportional to 1,529.52, 2,111.80 and 1,131.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,529.52 : 2,111.80 = 1,131.28 : x
2. Step 2: Convert to fraction form
   1,529.52/2,111.80 = 1,131.28/x
3. Step 3: Cross multiply
   1,529.52x = 2,111.80 × 1,131.28
4. Step 4: Simplify right side
   1,529.52x = 2,389,037.10
5. Step 5: Solve for x
   x = 2,389,037.10/1,529.52
6. Step 6: Final answer
   x = 1,561.95