Finding the Fourth Proportional to 12,693.09, 19,011.90 and 5,275.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,693.09 : 19,011.90 = 5,275.06 : x
2. Step 2: Convert to fraction form
   12,693.09/19,011.90 = 5,275.06/x
3. Step 3: Cross multiply
   12,693.09x = 19,011.90 × 5,275.06
4. Step 4: Simplify right side
   12,693.09x = 100,288,831.34
5. Step 5: Solve for x
   x = 100,288,831.34/12,693.09
6. Step 6: Final answer
   x = 7,901.06