Finding the Third Proportional to 78,397.88 and 105,340.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,397.88 : 105,340.50 = 105,340.50 : x
2. Step 2: Convert to fraction form
   78,397.88/105,340.50 = 105,340.50/x
3. Step 3: Cross multiply
   78,397.88x = 105,340.50 × 105,340.50
4. Step 4: Simplify right side
   78,397.88x = 11,096,620,940.25
5. Step 5: Solve for x
   x = 11,096,620,940.25/78,397.88
6. Step 6: Final answer
   x = 141,542.37