Finding the Fourth Proportional to 1,429.75, 1,973.08 and 1,115.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.75 : 1,973.08 = 1,115.37 : x
2. Step 2: Convert to fraction form
   1,429.75/1,973.08 = 1,115.37/x
3. Step 3: Cross multiply
   1,429.75x = 1,973.08 × 1,115.37
4. Step 4: Simplify right side
   1,429.75x = 2,200,718.77
5. Step 5: Solve for x
   x = 2,200,718.77/1,429.75
6. Step 6: Final answer
   x = 1,539.23