Finding the Third Proportional to 78,823.13 and 121,150.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,823.13 : 121,150.69 = 121,150.69 : x
2. Step 2: Convert to fraction form
   78,823.13/121,150.69 = 121,150.69/x
3. Step 3: Cross multiply
   78,823.13x = 121,150.69 × 121,150.69
4. Step 4: Simplify right side
   78,823.13x = 14,677,489,081.72
5. Step 5: Solve for x
   x = 14,677,489,081.72/78,823.13
6. Step 6: Final answer
   x = 186,207.91