Finding the Fourth Proportional to 13,191.72, 19,772.22 and 7,337.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.72 : 19,772.22 = 7,337.96 : x
2. Step 2: Convert to fraction form
   13,191.72/19,772.22 = 7,337.96/x
3. Step 3: Cross multiply
   13,191.72x = 19,772.22 × 7,337.96
4. Step 4: Simplify right side
   13,191.72x = 145,087,759.47
5. Step 5: Solve for x
   x = 145,087,759.47/13,191.72
6. Step 6: Final answer
   x = 10,998.40