Finding the Fourth Proportional to 1,565.60, 2,160.72 and 976.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,565.60 : 2,160.72 = 976.23 : x
2. Step 2: Convert to fraction form
   1,565.60/2,160.72 = 976.23/x
3. Step 3: Cross multiply
   1,565.60x = 2,160.72 × 976.23
4. Step 4: Simplify right side
   1,565.60x = 2,109,359.69
5. Step 5: Solve for x
   x = 2,109,359.69/1,565.60
6. Step 6: Final answer
   x = 1,347.32