Finding the Third Proportional to 77,772.50 and 116,719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   77,772.50 : 116,719.50 = 116,719.50 : x
2. Step 2: Convert to fraction form
   77,772.50/116,719.50 = 116,719.50/x
3. Step 3: Cross multiply
   77,772.50x = 116,719.50 × 116,719.50
4. Step 4: Simplify right side
   77,772.50x = 13,623,441,680.25
5. Step 5: Solve for x
   x = 13,623,441,680.25/77,772.50
6. Step 6: Final answer
   x = 175,170.42