Finding the Third Proportional to 55,498.50 and 90,609.75

Step by Step Solution

1. Step 1: Write the proportion equation
   55,498.50 : 90,609.75 = 90,609.75 : x
2. Step 2: Convert to fraction form
   55,498.50/90,609.75 = 90,609.75/x
3. Step 3: Cross multiply
   55,498.50x = 90,609.75 × 90,609.75
4. Step 4: Simplify right side
   55,498.50x = 8,210,126,795.06
5. Step 5: Solve for x
   x = 8,210,126,795.06/55,498.50
6. Step 6: Final answer
   x = 147,934.21