Finding the Fourth Proportional to 32,981.78, 45,487.28 and 21,642.45

Step by Step Solution

1. Step 1: Write the proportion equation
   32,981.78 : 45,487.28 = 21,642.45 : x
2. Step 2: Convert to fraction form
   32,981.78/45,487.28 = 21,642.45/x
3. Step 3: Cross multiply
   32,981.78x = 45,487.28 × 21,642.45
4. Step 4: Simplify right side
   32,981.78x = 984,456,285.98
5. Step 5: Solve for x
   x = 984,456,285.98/32,981.78
6. Step 6: Final answer
   x = 29,848.49