Finding the Third Proportional to 88,638.75 and 189,731.25

Step by Step Solution

1. Step 1: Write the proportion equation
   88,638.75 : 189,731.25 = 189,731.25 : x
2. Step 2: Convert to fraction form
   88,638.75/189,731.25 = 189,731.25/x
3. Step 3: Cross multiply
   88,638.75x = 189,731.25 × 189,731.25
4. Step 4: Simplify right side
   88,638.75x = 35,997,947,226.56
5. Step 5: Solve for x
   x = 35,997,947,226.56/88,638.75
6. Step 6: Final answer
   x = 406,119.75