Finding the Fourth Proportional to 21,126.72, 31,697.10 and 7,088.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,126.72 : 31,697.10 = 7,088.12 : x
2. Step 2: Convert to fraction form
   21,126.72/31,697.10 = 7,088.12/x
3. Step 3: Cross multiply
   21,126.72x = 31,697.10 × 7,088.12
4. Step 4: Simplify right side
   21,126.72x = 224,672,848.45
5. Step 5: Solve for x
   x = 224,672,848.45/21,126.72
6. Step 6: Final answer
   x = 10,634.54