Finding the Third Proportional to 53,478 and 84,111.75

Step by Step Solution

1. Step 1: Write the proportion equation
   53,478 : 84,111.75 = 84,111.75 : x
2. Step 2: Convert to fraction form
   53,478/84,111.75 = 84,111.75/x
3. Step 3: Cross multiply
   53,478x = 84,111.75 × 84,111.75
4. Step 4: Simplify right side
   53,478x = 7,074,786,488.06
5. Step 5: Solve for x
   x = 7,074,786,488.06/53,478
6. Step 6: Final answer
   x = 132,293.40