Finding the Fourth Proportional to 13,909.89, 19,196.43 and 7,943.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,909.89 : 19,196.43 = 7,943.50 : x
2. Step 2: Convert to fraction form
   13,909.89/19,196.43 = 7,943.50/x
3. Step 3: Cross multiply
   13,909.89x = 19,196.43 × 7,943.50
4. Step 4: Simplify right side
   13,909.89x = 152,486,835.91
5. Step 5: Solve for x
   x = 152,486,835.91/13,909.89
6. Step 6: Final answer
   x = 10,962.47