Finding the Fourth Proportional to 21,856.34, 32,787.42 and 7,061.66

Step by Step Solution

1. Step 1: Write the proportion equation
   21,856.34 : 32,787.42 = 7,061.66 : x
2. Step 2: Convert to fraction form
   21,856.34/32,787.42 = 7,061.66/x
3. Step 3: Cross multiply
   21,856.34x = 32,787.42 × 7,061.66
4. Step 4: Simplify right side
   21,856.34x = 231,533,612.32
5. Step 5: Solve for x
   x = 231,533,612.32/21,856.34
6. Step 6: Final answer
   x = 10,593.43