Finding the Fourth Proportional to 13,016.51, 19,532.79 and 5,117.64

Step by Step Solution

1. Step 1: Write the proportion equation
   13,016.51 : 19,532.79 = 5,117.64 : x
2. Step 2: Convert to fraction form
   13,016.51/19,532.79 = 5,117.64/x
3. Step 3: Cross multiply
   13,016.51x = 19,532.79 × 5,117.64
4. Step 4: Simplify right side
   13,016.51x = 99,961,787.42
5. Step 5: Solve for x
   x = 99,961,787.42/13,016.51
6. Step 6: Final answer
   x = 7,679.62