Finding the Fourth Proportional to 1,498.78, 2,251.77 and 1,415.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.78 : 2,251.77 = 1,415.89 : x
2. Step 2: Convert to fraction form
   1,498.78/2,251.77 = 1,415.89/x
3. Step 3: Cross multiply
   1,498.78x = 2,251.77 × 1,415.89
4. Step 4: Simplify right side
   1,498.78x = 3,188,258.63
5. Step 5: Solve for x
   x = 3,188,258.63/1,498.78
6. Step 6: Final answer
   x = 2,127.24