Finding the Third Proportional to 53,707 and 82,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,707 : 82,990.50 = 82,990.50 : x
2. Step 2: Convert to fraction form
   53,707/82,990.50 = 82,990.50/x
3. Step 3: Cross multiply
   53,707x = 82,990.50 × 82,990.50
4. Step 4: Simplify right side
   53,707x = 6,887,423,090.25
5. Step 5: Solve for x
   x = 6,887,423,090.25/53,707
6. Step 6: Final answer
   x = 128,240.70