Finding the Fourth Proportional to 1,851.50, 2,555.69 and 1,223.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.50 : 2,555.69 = 1,223.75 : x
2. Step 2: Convert to fraction form
   1,851.50/2,555.69 = 1,223.75/x
3. Step 3: Cross multiply
   1,851.50x = 2,555.69 × 1,223.75
4. Step 4: Simplify right side
   1,851.50x = 3,127,506.74
5. Step 5: Solve for x
   x = 3,127,506.74/1,851.50
6. Step 6: Final answer
   x = 1,689.18