Finding the Fourth Proportional to 21,990.88, 32,975.34 and 7,192.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,990.88 : 32,975.34 = 7,192.12 : x
2. Step 2: Convert to fraction form
   21,990.88/32,975.34 = 7,192.12/x
3. Step 3: Cross multiply
   21,990.88x = 32,975.34 × 7,192.12
4. Step 4: Simplify right side
   21,990.88x = 237,162,602.32
5. Step 5: Solve for x
   x = 237,162,602.32/21,990.88
6. Step 6: Final answer
   x = 10,784.59