Finding the Fourth Proportional to 13,111.68, 19,667.46 and 5,320.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.68 : 19,667.46 = 5,320.46 : x
2. Step 2: Convert to fraction form
   13,111.68/19,667.46 = 5,320.46/x
3. Step 3: Cross multiply
   13,111.68x = 19,667.46 × 5,320.46
4. Step 4: Simplify right side
   13,111.68x = 104,639,934.23
5. Step 5: Solve for x
   x = 104,639,934.23/13,111.68
6. Step 6: Final answer
   x = 7,980.67