Finding the Third Proportional to 30,889 and 67,792.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,889 : 67,792.50 = 67,792.50 : x
2. Step 2: Convert to fraction form
   30,889/67,792.50 = 67,792.50/x
3. Step 3: Cross multiply
   30,889x = 67,792.50 × 67,792.50
4. Step 4: Simplify right side
   30,889x = 4,595,823,056.25
5. Step 5: Solve for x
   x = 4,595,823,056.25/30,889
6. Step 6: Final answer
   x = 148,785.10