Finding the Third Proportional to 31,156,986 and 67,800,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,156,986 : 67,800,091.50 = 67,800,091.50 : x
2. Step 2: Convert to fraction form
   31,156,986/67,800,091.50 = 67,800,091.50/x
3. Step 3: Cross multiply
   31,156,986x = 67,800,091.50 × 67,800,091.50
4. Step 4: Simplify right side
   31,156,986x = 4,596,852,407,408,372
5. Step 5: Solve for x
   x = 4,596,852,407,408,372/31,156,986
6. Step 6: Final answer
   x = 147,538,417.46