Finding the Fourth Proportional to 1,805.61, 2,488.03 and 1,385.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,805.61 : 2,488.03 = 1,385.94 : x
2. Step 2: Convert to fraction form
   1,805.61/2,488.03 = 1,385.94/x
3. Step 3: Cross multiply
   1,805.61x = 2,488.03 × 1,385.94
4. Step 4: Simplify right side
   1,805.61x = 3,448,260.30
5. Step 5: Solve for x
   x = 3,448,260.30/1,805.61
6. Step 6: Final answer
   x = 1,909.75