Finding the Third Proportional to 42,015.38 and 90,402.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,015.38 : 90,402.75 = 90,402.75 : x
2. Step 2: Convert to fraction form
   42,015.38/90,402.75 = 90,402.75/x
3. Step 3: Cross multiply
   42,015.38x = 90,402.75 × 90,402.75
4. Step 4: Simplify right side
   42,015.38x = 8,172,657,207.56
5. Step 5: Solve for x
   x = 8,172,657,207.56/42,015.38
6. Step 6: Final answer
   x = 194,515.87