Finding the Third Proportional to 42,087,225 and 90,440,209.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,087,225 : 90,440,209.50 = 90,440,209.50 : x
2. Step 2: Convert to fraction form
   42,087,225/90,440,209.50 = 90,440,209.50/x
3. Step 3: Cross multiply
   42,087,225x = 90,440,209.50 × 90,440,209.50
4. Step 4: Simplify right side
   42,087,225x = 8,179,431,494,403,890
5. Step 5: Solve for x
   x = 8,179,431,494,403,890/42,087,225
6. Step 6: Final answer
   x = 194,344,756.50