Finding the Fourth Proportional to 13,428.48, 18,529.89 and 7,762.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,428.48 : 18,529.89 = 7,762.34 : x
2. Step 2: Convert to fraction form
   13,428.48/18,529.89 = 7,762.34/x
3. Step 3: Cross multiply
   13,428.48x = 18,529.89 × 7,762.34
4. Step 4: Simplify right side
   13,428.48x = 143,835,213.69
5. Step 5: Solve for x
   x = 143,835,213.69/13,428.48
6. Step 6: Final answer
   x = 10,711.21