Finding the Fourth Proportional to 1,058.00, 1,459.92 and 615.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,058.00 : 1,459.92 = 615.78 : x
2. Step 2: Convert to fraction form
   1,058.00/1,459.92 = 615.78/x
3. Step 3: Cross multiply
   1,058.00x = 1,459.92 × 615.78
4. Step 4: Simplify right side
   1,058.00x = 898,989.54
5. Step 5: Solve for x
   x = 898,989.54/1,058.00
6. Step 6: Final answer
   x = 849.71