Finding the Fourth Proportional to 2,123.02, 2,929.70 and 1,238.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.02 : 2,929.70 = 1,238.76 : x
2. Step 2: Convert to fraction form
   2,123.02/2,929.70 = 1,238.76/x
3. Step 3: Cross multiply
   2,123.02x = 2,929.70 × 1,238.76
4. Step 4: Simplify right side
   2,123.02x = 3,629,195.17
5. Step 5: Solve for x
   x = 3,629,195.17/2,123.02
6. Step 6: Final answer
   x = 1,709.45