Finding the Fourth Proportional to 1,146.06, 1,720.10 and 591.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.06 : 1,720.10 = 591.15 : x
2. Step 2: Convert to fraction form
   1,146.06/1,720.10 = 591.15/x
3. Step 3: Cross multiply
   1,146.06x = 1,720.10 × 591.15
4. Step 4: Simplify right side
   1,146.06x = 1,016,825.56
5. Step 5: Solve for x
   x = 1,016,825.56/1,146.06
6. Step 6: Final answer
   x = 887.24