Finding the Fourth Proportional to 2,888.76, 4,331.98 and 1,109.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,888.76 : 4,331.98 = 1,109.57 : x
2. Step 2: Convert to fraction form
   2,888.76/4,331.98 = 1,109.57/x
3. Step 3: Cross multiply
   2,888.76x = 4,331.98 × 1,109.57
4. Step 4: Simplify right side
   2,888.76x = 4,806,614.78
5. Step 5: Solve for x
   x = 4,806,614.78/2,888.76
6. Step 6: Final answer
   x = 1,663.90