Finding the Fourth Proportional to 13,809.27, 19,056.83 and 7,521.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,809.27 : 19,056.83 = 7,521.51 : x
2. Step 2: Convert to fraction form
   13,809.27/19,056.83 = 7,521.51/x
3. Step 3: Cross multiply
   13,809.27x = 19,056.83 × 7,521.51
4. Step 4: Simplify right side
   13,809.27x = 143,336,099.81
5. Step 5: Solve for x
   x = 143,336,099.81/13,809.27
6. Step 6: Final answer
   x = 10,379.70