Finding the Fourth Proportional to 1,861.35, 2,569.05 and 1,231.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.35 : 2,569.05 = 1,231.98 : x
2. Step 2: Convert to fraction form
   1,861.35/2,569.05 = 1,231.98/x
3. Step 3: Cross multiply
   1,861.35x = 2,569.05 × 1,231.98
4. Step 4: Simplify right side
   1,861.35x = 3,165,018.22
5. Step 5: Solve for x
   x = 3,165,018.22/1,861.35
6. Step 6: Final answer
   x = 1,700.39