Finding the Third Proportional to 42,139.69 and 90,532.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42,139.69 : 90,532.69 = 90,532.69 : x
2. Step 2: Convert to fraction form
   42,139.69/90,532.69 = 90,532.69/x
3. Step 3: Cross multiply
   42,139.69x = 90,532.69 × 90,532.69
4. Step 4: Simplify right side
   42,139.69x = 8,196,167,505.97
5. Step 5: Solve for x
   x = 8,196,167,505.97/42,139.69
6. Step 6: Final answer
   x = 194,499.96