Finding the Fourth Proportional to 1,870.74, 2,802.99 and 1,276.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.74 : 2,802.99 = 1,276.89 : x
2. Step 2: Convert to fraction form
   1,870.74/2,802.99 = 1,276.89/x
3. Step 3: Cross multiply
   1,870.74x = 2,802.99 × 1,276.89
4. Step 4: Simplify right side
   1,870.74x = 3,579,109.90
5. Step 5: Solve for x
   x = 3,579,109.90/1,870.74
6. Step 6: Final answer
   x = 1,913.21