Finding the Third Proportional to 42,112.50 and 90,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,112.50 : 90,421.50 = 90,421.50 : x
2. Step 2: Convert to fraction form
   42,112.50/90,421.50 = 90,421.50/x
3. Step 3: Cross multiply
   42,112.50x = 90,421.50 × 90,421.50
4. Step 4: Simplify right side
   42,112.50x = 8,176,047,662.25
5. Step 5: Solve for x
   x = 8,176,047,662.25/42,112.50
6. Step 6: Final answer
   x = 194,147.76