Finding the Third Proportional to 55,779.25 and 84,975.75

Step by Step Solution

1. Step 1: Write the proportion equation
   55,779.25 : 84,975.75 = 84,975.75 : x
2. Step 2: Convert to fraction form
   55,779.25/84,975.75 = 84,975.75/x
3. Step 3: Cross multiply
   55,779.25x = 84,975.75 × 84,975.75
4. Step 4: Simplify right side
   55,779.25x = 7,220,878,088.06
5. Step 5: Solve for x
   x = 7,220,878,088.06/55,779.25
6. Step 6: Final answer
   x = 129,454.56