Finding the Fourth Proportional to 1,429.26, 1,971.72 and 1,113.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.26 : 1,971.72 = 1,113.99 : x
2. Step 2: Convert to fraction form
   1,429.26/1,971.72 = 1,113.99/x
3. Step 3: Cross multiply
   1,429.26x = 1,971.72 × 1,113.99
4. Step 4: Simplify right side
   1,429.26x = 2,196,476.36
5. Step 5: Solve for x
   x = 2,196,476.36/1,429.26
6. Step 6: Final answer
   x = 1,536.79