Finding the Fourth Proportional to 21,908.67, 32,864.16 and 7,116.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,908.67 : 32,864.16 = 7,116.50 : x
2. Step 2: Convert to fraction form
   21,908.67/32,864.16 = 7,116.50/x
3. Step 3: Cross multiply
   21,908.67x = 32,864.16 × 7,116.50
4. Step 4: Simplify right side
   21,908.67x = 233,877,630.32
5. Step 5: Solve for x
   x = 233,877,630.32/21,908.67
6. Step 6: Final answer
   x = 10,675.12