Finding the Fourth Proportional to 1,434.47, 1,980.51 and 1,102.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.47 : 1,980.51 = 1,102.30 : x
2. Step 2: Convert to fraction form
   1,434.47/1,980.51 = 1,102.30/x
3. Step 3: Cross multiply
   1,434.47x = 1,980.51 × 1,102.30
4. Step 4: Simplify right side
   1,434.47x = 2,183,116.17
5. Step 5: Solve for x
   x = 2,183,116.17/1,434.47
6. Step 6: Final answer
   x = 1,521.90