Finding the Third Proportional to 55,991.25 and 84,875.25

Step by Step Solution

1. Step 1: Write the proportion equation
   55,991.25 : 84,875.25 = 84,875.25 : x
2. Step 2: Convert to fraction form
   55,991.25/84,875.25 = 84,875.25/x
3. Step 3: Cross multiply
   55,991.25x = 84,875.25 × 84,875.25
4. Step 4: Simplify right side
   55,991.25x = 7,203,808,062.56
5. Step 5: Solve for x
   x = 7,203,808,062.56/55,991.25
6. Step 6: Final answer
   x = 128,659.53