Finding the Third Proportional to 42,318 and 90,265.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,318 : 90,265.50 = 90,265.50 : x
2. Step 2: Convert to fraction form
   42,318/90,265.50 = 90,265.50/x
3. Step 3: Cross multiply
   42,318x = 90,265.50 × 90,265.50
4. Step 4: Simplify right side
   42,318x = 8,147,860,490.25
5. Step 5: Solve for x
   x = 8,147,860,490.25/42,318
6. Step 6: Final answer
   x = 192,538.88