Finding the Fourth Proportional to 1,553.28, 2,123.52 and 1,553.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.28 : 2,123.52 = 1,553.28 : x
2. Step 2: Convert to fraction form
   1,553.28/2,123.52 = 1,553.28/x
3. Step 3: Cross multiply
   1,553.28x = 2,123.52 × 1,553.28
4. Step 4: Simplify right side
   1,553.28x = 3,298,421.15
5. Step 5: Solve for x
   x = 3,298,421.15/1,553.28
6. Step 6: Final answer
   x = 2,123.52