Finding the Third Proportional to 51,931.13 and 84,790.69

Step by Step Solution

1. Step 1: Write the proportion equation
   51,931.13 : 84,790.69 = 84,790.69 : x
2. Step 2: Convert to fraction form
   51,931.13/84,790.69 = 84,790.69/x
3. Step 3: Cross multiply
   51,931.13x = 84,790.69 × 84,790.69
4. Step 4: Simplify right side
   51,931.13x = 7,189,460,686.72
5. Step 5: Solve for x
   x = 7,189,460,686.72/51,931.13
6. Step 6: Final answer
   x = 138,442.23