Finding the Third Proportional to 191,719.50 and 415,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,719.50 : 415,171.50 = 415,171.50 : x
2. Step 2: Convert to fraction form
   191,719.50/415,171.50 = 415,171.50/x
3. Step 3: Cross multiply
   191,719.50x = 415,171.50 × 415,171.50
4. Step 4: Simplify right side
   191,719.50x = 172,367,374,412.25
5. Step 5: Solve for x
   x = 172,367,374,412.25/191,719.50
6. Step 6: Final answer
   x = 899,060.21