Finding the Third Proportional to 31,234 and 66,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,234 : 66,090.50 = 66,090.50 : x
2. Step 2: Convert to fraction form
   31,234/66,090.50 = 66,090.50/x
3. Step 3: Cross multiply
   31,234x = 66,090.50 × 66,090.50
4. Step 4: Simplify right side
   31,234x = 4,367,954,190.25
5. Step 5: Solve for x
   x = 4,367,954,190.25/31,234
6. Step 6: Final answer
   x = 139,846.14