Finding the Third Proportional to 53,947.31 and 81,670.69

Step by Step Solution

1. Step 1: Write the proportion equation
   53,947.31 : 81,670.69 = 81,670.69 : x
2. Step 2: Convert to fraction form
   53,947.31/81,670.69 = 81,670.69/x
3. Step 3: Cross multiply
   53,947.31x = 81,670.69 × 81,670.69
4. Step 4: Simplify right side
   53,947.31x = 6,670,101,196.72
5. Step 5: Solve for x
   x = 6,670,101,196.72/53,947.31
6. Step 6: Final answer
   x = 123,641.03