Finding the Fourth Proportional to 21,384, 32,088.96 and 9,072

Step by Step Solution

1. Step 1: Write the proportion equation
   21,384 : 32,088.96 = 9,072 : x
2. Step 2: Convert to fraction form
   21,384/32,088.96 = 9,072/x
3. Step 3: Cross multiply
   21,384x = 32,088.96 × 9,072
4. Step 4: Simplify right side
   21,384x = 291,111,045.12
5. Step 5: Solve for x
   x = 291,111,045.12/21,384
6. Step 6: Final answer
   x = 13,613.50