Finding the Fourth Proportional to 13,105.60, 19,666.50 and 5,314.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.60 : 19,666.50 = 5,314.48 : x
2. Step 2: Convert to fraction form
   13,105.60/19,666.50 = 5,314.48/x
3. Step 3: Cross multiply
   13,105.60x = 19,666.50 × 5,314.48
4. Step 4: Simplify right side
   13,105.60x = 104,517,220.92
5. Step 5: Solve for x
   x = 104,517,220.92/13,105.60
6. Step 6: Final answer
   x = 7,975.00