Finding the Fourth Proportional to 12,953.16, 19,426.86 and 5,159.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,953.16 : 19,426.86 = 5,159.88 : x
2. Step 2: Convert to fraction form
   12,953.16/19,426.86 = 5,159.88/x
3. Step 3: Cross multiply
   12,953.16x = 19,426.86 × 5,159.88
4. Step 4: Simplify right side
   12,953.16x = 100,240,266.38
5. Step 5: Solve for x
   x = 100,240,266.38/12,953.16
6. Step 6: Final answer
   x = 7,738.67