Finding the Fourth Proportional to 1,111.98, 1,667.23 and 591.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.98 : 1,667.23 = 591.65 : x
2. Step 2: Convert to fraction form
   1,111.98/1,667.23 = 591.65/x
3. Step 3: Cross multiply
   1,111.98x = 1,667.23 × 591.65
4. Step 4: Simplify right side
   1,111.98x = 986,425.77
5. Step 5: Solve for x
   x = 986,425.77/1,111.98
6. Step 6: Final answer
   x = 887.09