Finding the Fourth Proportional to 1,623.76, 2,238.76 and 1,098.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,623.76 : 2,238.76 = 1,098.88 : x
2. Step 2: Convert to fraction form
   1,623.76/2,238.76 = 1,098.88/x
3. Step 3: Cross multiply
   1,623.76x = 2,238.76 × 1,098.88
4. Step 4: Simplify right side
   1,623.76x = 2,460,128.59
5. Step 5: Solve for x
   x = 2,460,128.59/1,623.76
6. Step 6: Final answer
   x = 1,515.08