Finding the Fourth Proportional to 13,019.07, 19,530.69 and 5,625.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.07 : 19,530.69 = 5,625.78 : x
2. Step 2: Convert to fraction form
   13,019.07/19,530.69 = 5,625.78/x
3. Step 3: Cross multiply
   13,019.07x = 19,530.69 × 5,625.78
4. Step 4: Simplify right side
   13,019.07x = 109,875,365.19
5. Step 5: Solve for x
   x = 109,875,365.19/13,019.07
6. Step 6: Final answer
   x = 8,439.57