Finding the Third Proportional to 12,901.78 and 31,069.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,901.78 : 31,069.83 = 31,069.83 : x
2. Step 2: Convert to fraction form
   12,901.78/31,069.83 = 31,069.83/x
3. Step 3: Cross multiply
   12,901.78x = 31,069.83 × 31,069.83
4. Step 4: Simplify right side
   12,901.78x = 965,334,219.72
5. Step 5: Solve for x
   x = 965,334,219.72/12,901.78
6. Step 6: Final answer
   x = 74,821.78