Finding the Third Proportional to 78,418.50 and 105,364.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,418.50 : 105,364.50 = 105,364.50 : x
2. Step 2: Convert to fraction form
   78,418.50/105,364.50 = 105,364.50/x
3. Step 3: Cross multiply
   78,418.50x = 105,364.50 × 105,364.50
4. Step 4: Simplify right side
   78,418.50x = 11,101,677,860.25
5. Step 5: Solve for x
   x = 11,101,677,860.25/78,418.50
6. Step 6: Final answer
   x = 141,569.63