Finding the Third Proportional to 31,290 and 47,200.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,290 : 47,200.50 = 47,200.50 : x
2. Step 2: Convert to fraction form
   31,290/47,200.50 = 47,200.50/x
3. Step 3: Cross multiply
   31,290x = 47,200.50 × 47,200.50
4. Step 4: Simplify right side
   31,290x = 2,227,887,200.25
5. Step 5: Solve for x
   x = 2,227,887,200.25/31,290
6. Step 6: Final answer
   x = 71,201.25