Finding the Fourth Proportional to 1,429.42, 1,971.39 and 1,098.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.42 : 1,971.39 = 1,098.66 : x
2. Step 2: Convert to fraction form
   1,429.42/1,971.39 = 1,098.66/x
3. Step 3: Cross multiply
   1,429.42x = 1,971.39 × 1,098.66
4. Step 4: Simplify right side
   1,429.42x = 2,165,887.34
5. Step 5: Solve for x
   x = 2,165,887.34/1,429.42
6. Step 6: Final answer
   x = 1,515.22