Finding the Third Proportional to 78,422.50 and 121,522

Step by Step Solution

1. Step 1: Write the proportion equation
   78,422.50 : 121,522 = 121,522 : x
2. Step 2: Convert to fraction form
   78,422.50/121,522 = 121,522/x
3. Step 3: Cross multiply
   78,422.50x = 121,522 × 121,522
4. Step 4: Simplify right side
   78,422.50x = 14,767,596,484
5. Step 5: Solve for x
   x = 14,767,596,484/78,422.50
6. Step 6: Final answer
   x = 188,308.16