Finding the Fourth Proportional to 1,113.31, 1,536.33 and 615.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.31 : 1,536.33 = 615.92 : x
2. Step 2: Convert to fraction form
   1,113.31/1,536.33 = 615.92/x
3. Step 3: Cross multiply
   1,113.31x = 1,536.33 × 615.92
4. Step 4: Simplify right side
   1,113.31x = 946,256.37
5. Step 5: Solve for x
   x = 946,256.37/1,113.31
6. Step 6: Final answer
   x = 849.95