Finding the Fourth Proportional to 1,498.88, 2,238.12 and 1,187.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.88 : 2,238.12 = 1,187.20 : x
2. Step 2: Convert to fraction form
   1,498.88/2,238.12 = 1,187.20/x
3. Step 3: Cross multiply
   1,498.88x = 2,238.12 × 1,187.20
4. Step 4: Simplify right side
   1,498.88x = 2,657,096.06
5. Step 5: Solve for x
   x = 2,657,096.06/1,498.88
6. Step 6: Final answer
   x = 1,772.72