Finding the Fourth Proportional to 1,665.72, 2,500.80 and 1,047.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.72 : 2,500.80 = 1,047.48 : x
2. Step 2: Convert to fraction form
   1,665.72/2,500.80 = 1,047.48/x
3. Step 3: Cross multiply
   1,665.72x = 2,500.80 × 1,047.48
4. Step 4: Simplify right side
   1,665.72x = 2,619,537.98
5. Step 5: Solve for x
   x = 2,619,537.98/1,665.72
6. Step 6: Final answer
   x = 1,572.62