Finding the Fourth Proportional to 13,003.52, 19,508.15 and 5,106.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,003.52 : 19,508.15 = 5,106.79 : x
2. Step 2: Convert to fraction form
   13,003.52/19,508.15 = 5,106.79/x
3. Step 3: Cross multiply
   13,003.52x = 19,508.15 × 5,106.79
4. Step 4: Simplify right side
   13,003.52x = 99,623,989.34
5. Step 5: Solve for x
   x = 99,623,989.34/13,003.52
6. Step 6: Final answer
   x = 7,661.31