Finding the Third Proportional to 55,779.75 and 84,976.88

Step by Step Solution

1. Step 1: Write the proportion equation
   55,779.75 : 84,976.88 = 84,976.88 : x
2. Step 2: Convert to fraction form
   55,779.75/84,976.88 = 84,976.88/x
3. Step 3: Cross multiply
   55,779.75x = 84,976.88 × 84,976.88
4. Step 4: Simplify right side
   55,779.75x = 7,221,069,284.77
5. Step 5: Solve for x
   x = 7,221,069,284.77/55,779.75
6. Step 6: Final answer
   x = 129,456.82