Finding the Fourth Proportional to 1,401.80, 2,100.63 and 1,248.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.80 : 2,100.63 = 1,248.02 : x
2. Step 2: Convert to fraction form
   1,401.80/2,100.63 = 1,248.02/x
3. Step 3: Cross multiply
   1,401.80x = 2,100.63 × 1,248.02
4. Step 4: Simplify right side
   1,401.80x = 2,621,617.75
5. Step 5: Solve for x
   x = 2,621,617.75/1,401.80
6. Step 6: Final answer
   x = 1,870.19