Finding the Fourth Proportional to 21,240.82, 31,841.33 and 7,191.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,240.82 : 31,841.33 = 7,191.02 : x
2. Step 2: Convert to fraction form
   21,240.82/31,841.33 = 7,191.02/x
3. Step 3: Cross multiply
   21,240.82x = 31,841.33 × 7,191.02
4. Step 4: Simplify right side
   21,240.82x = 228,971,445.69
5. Step 5: Solve for x
   x = 228,971,445.69/21,240.82
6. Step 6: Final answer
   x = 10,779.78