Finding the Fourth Proportional to 13,808.72, 19,056.03 and 7,521.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,808.72 : 19,056.03 = 7,521.10 : x
2. Step 2: Convert to fraction form
   13,808.72/19,056.03 = 7,521.10/x
3. Step 3: Cross multiply
   13,808.72x = 19,056.03 × 7,521.10
4. Step 4: Simplify right side
   13,808.72x = 143,322,259.59
5. Step 5: Solve for x
   x = 143,322,259.59/13,808.72
6. Step 6: Final answer
   x = 10,379.11