Finding the Fourth Proportional to 1,870.40, 2,580.68 and 1,124.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.40 : 2,580.68 = 1,124.21 : x
2. Step 2: Convert to fraction form
   1,870.40/2,580.68 = 1,124.21/x
3. Step 3: Cross multiply
   1,870.40x = 2,580.68 × 1,124.21
4. Step 4: Simplify right side
   1,870.40x = 2,901,216.17
5. Step 5: Solve for x
   x = 2,901,216.17/1,870.40
6. Step 6: Final answer
   x = 1,551.12