Finding the Fourth Proportional to 1,131.30, 1,697.52 and 538.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.30 : 1,697.52 = 538.99 : x
2. Step 2: Convert to fraction form
   1,131.30/1,697.52 = 538.99/x
3. Step 3: Cross multiply
   1,131.30x = 1,697.52 × 538.99
4. Step 4: Simplify right side
   1,131.30x = 914,939.16
5. Step 5: Solve for x
   x = 914,939.16/1,131.30
6. Step 6: Final answer
   x = 808.75