Finding the Fourth Proportional to 1,861.63, 2,569.65 and 1,339.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.63 : 2,569.65 = 1,339.18 : x
2. Step 2: Convert to fraction form
   1,861.63/2,569.65 = 1,339.18/x
3. Step 3: Cross multiply
   1,861.63x = 2,569.65 × 1,339.18
4. Step 4: Simplify right side
   1,861.63x = 3,441,223.89
5. Step 5: Solve for x
   x = 3,441,223.89/1,861.63
6. Step 6: Final answer
   x = 1,848.50