Finding the Fourth Proportional to 12,798.61, 19,200.51 and 5,403.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,798.61 : 19,200.51 = 5,403.04 : x
2. Step 2: Convert to fraction form
   12,798.61/19,200.51 = 5,403.04/x
3. Step 3: Cross multiply
   12,798.61x = 19,200.51 × 5,403.04
4. Step 4: Simplify right side
   12,798.61x = 103,741,075.55
5. Step 5: Solve for x
   x = 103,741,075.55/12,798.61
6. Step 6: Final answer
   x = 8,105.65