Finding the Fourth Proportional to 13,061.60, 19,563.60 and 5,266.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,061.60 : 19,563.60 = 5,266.40 : x
2. Step 2: Convert to fraction form
   13,061.60/19,563.60 = 5,266.40/x
3. Step 3: Cross multiply
   13,061.60x = 19,563.60 × 5,266.40
4. Step 4: Simplify right side
   13,061.60x = 103,029,743.04
5. Step 5: Solve for x
   x = 103,029,743.04/13,061.60
6. Step 6: Final answer
   x = 7,887.99