Finding the Third Proportional to 31,128 and 48,279.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128 : 48,279.50 = 48,279.50 : x
2. Step 2: Convert to fraction form
   31,128/48,279.50 = 48,279.50/x
3. Step 3: Cross multiply
   31,128x = 48,279.50 × 48,279.50
4. Step 4: Simplify right side
   31,128x = 2,330,910,120.25
5. Step 5: Solve for x
   x = 2,330,910,120.25/31,128
6. Step 6: Final answer
   x = 74,881.46