Finding the Third Proportional to 12,912 and 27,799.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,912 : 27,799.50 = 27,799.50 : x
2. Step 2: Convert to fraction form
   12,912/27,799.50 = 27,799.50/x
3. Step 3: Cross multiply
   12,912x = 27,799.50 × 27,799.50
4. Step 4: Simplify right side
   12,912x = 772,812,200.25
5. Step 5: Solve for x
   x = 772,812,200.25/12,912
6. Step 6: Final answer
   x = 59,852.25