Finding the Fourth Proportional to 17,545.48, 24,212.72 and 9,991.40

Step by Step Solution

1. Step 1: Write the proportion equation
   17,545.48 : 24,212.72 = 9,991.40 : x
2. Step 2: Convert to fraction form
   17,545.48/24,212.72 = 9,991.40/x
3. Step 3: Cross multiply
   17,545.48x = 24,212.72 × 9,991.40
4. Step 4: Simplify right side
   17,545.48x = 241,918,970.61
5. Step 5: Solve for x
   x = 241,918,970.61/17,545.48
6. Step 6: Final answer
   x = 13,788.11