Finding the Fourth Proportional to 1,079.18, 1,617.15 and 591.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.18 : 1,617.15 = 591.56 : x
2. Step 2: Convert to fraction form
   1,079.18/1,617.15 = 591.56/x
3. Step 3: Cross multiply
   1,079.18x = 1,617.15 × 591.56
4. Step 4: Simplify right side
   1,079.18x = 956,641.25
5. Step 5: Solve for x
   x = 956,641.25/1,079.18
6. Step 6: Final answer
   x = 886.45