Finding the Fourth Proportional to 1,868.86, 2,790.32 and 1,591.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.86 : 2,790.32 = 1,591.03 : x
2. Step 2: Convert to fraction form
   1,868.86/2,790.32 = 1,591.03/x
3. Step 3: Cross multiply
   1,868.86x = 2,790.32 × 1,591.03
4. Step 4: Simplify right side
   1,868.86x = 4,439,482.83
5. Step 5: Solve for x
   x = 4,439,482.83/1,868.86
6. Step 6: Final answer
   x = 2,375.50