Finding the Third Proportional to 7,785.56 and 12,088.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,785.56 : 12,088.69 = 12,088.69 : x
2. Step 2: Convert to fraction form
   7,785.56/12,088.69 = 12,088.69/x
3. Step 3: Cross multiply
   7,785.56x = 12,088.69 × 12,088.69
4. Step 4: Simplify right side
   7,785.56x = 146,136,365.47
5. Step 5: Solve for x
   x = 146,136,365.47/7,785.56
6. Step 6: Final answer
   x = 18,770.17