Finding the Fourth Proportional to 2,102.57, 2,900.59 and 1,429.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,102.57 : 2,900.59 = 1,429.55 : x
2. Step 2: Convert to fraction form
   2,102.57/2,900.59 = 1,429.55/x
3. Step 3: Cross multiply
   2,102.57x = 2,900.59 × 1,429.55
4. Step 4: Simplify right side
   2,102.57x = 4,146,538.43
5. Step 5: Solve for x
   x = 4,146,538.43/2,102.57
6. Step 6: Final answer
   x = 1,972.13