Finding the Fourth Proportional to 25,105.70, 34,645.91 and 13,776.16

Step by Step Solution

1. Step 1: Write the proportion equation
   25,105.70 : 34,645.91 = 13,776.16 : x
2. Step 2: Convert to fraction form
   25,105.70/34,645.91 = 13,776.16/x
3. Step 3: Cross multiply
   25,105.70x = 34,645.91 × 13,776.16
4. Step 4: Simplify right side
   25,105.70x = 477,287,444.01
5. Step 5: Solve for x
   x = 477,287,444.01/25,105.70
6. Step 6: Final answer
   x = 19,011.12