Finding the Fourth Proportional to 2,802.71, 4,205.01 and 1,242.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,802.71 : 4,205.01 = 1,242.50 : x
2. Step 2: Convert to fraction form
   2,802.71/4,205.01 = 1,242.50/x
3. Step 3: Cross multiply
   2,802.71x = 4,205.01 × 1,242.50
4. Step 4: Simplify right side
   2,802.71x = 5,224,724.93
5. Step 5: Solve for x
   x = 5,224,724.93/2,802.71
6. Step 6: Final answer
   x = 1,864.17