Finding the Fourth Proportional to 1,851.86, 2,555.48 and 1,012.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.86 : 2,555.48 = 1,012.50 : x
2. Step 2: Convert to fraction form
   1,851.86/2,555.48 = 1,012.50/x
3. Step 3: Cross multiply
   1,851.86x = 2,555.48 × 1,012.50
4. Step 4: Simplify right side
   1,851.86x = 2,587,426.03
5. Step 5: Solve for x
   x = 2,587,426.03/1,851.86
6. Step 6: Final answer
   x = 1,397.20