Finding the Fourth Proportional to 13,145.84, 19,711.32 and 5,345.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,145.84 : 19,711.32 = 5,345.48 : x
2. Step 2: Convert to fraction form
   13,145.84/19,711.32 = 5,345.48/x
3. Step 3: Cross multiply
   13,145.84x = 19,711.32 × 5,345.48
4. Step 4: Simplify right side
   13,145.84x = 105,366,466.83
5. Step 5: Solve for x
   x = 105,366,466.83/13,145.84
6. Step 6: Final answer
   x = 8,015.19