Finding the Fourth Proportional to 1,156.41, 1,595.54 and 861.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156.41 : 1,595.54 = 861.17 : x
2. Step 2: Convert to fraction form
   1,156.41/1,595.54 = 861.17/x
3. Step 3: Cross multiply
   1,156.41x = 1,595.54 × 861.17
4. Step 4: Simplify right side
   1,156.41x = 1,374,018.90
5. Step 5: Solve for x
   x = 1,374,018.90/1,156.41
6. Step 6: Final answer
   x = 1,188.18