Finding the Fourth Proportional to 1,111.92, 1,666.98 and 591.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.92 : 1,666.98 = 591.63 : x
2. Step 2: Convert to fraction form
   1,111.92/1,666.98 = 591.63/x
3. Step 3: Cross multiply
   1,111.92x = 1,666.98 × 591.63
4. Step 4: Simplify right side
   1,111.92x = 986,235.38
5. Step 5: Solve for x
   x = 986,235.38/1,111.92
6. Step 6: Final answer
   x = 886.97