Finding the Third Proportional to 42,315.75 and 89,385.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,315.75 : 89,385.75 = 89,385.75 : x
2. Step 2: Convert to fraction form
   42,315.75/89,385.75 = 89,385.75/x
3. Step 3: Cross multiply
   42,315.75x = 89,385.75 × 89,385.75
4. Step 4: Simplify right side
   42,315.75x = 7,989,812,303.06
5. Step 5: Solve for x
   x = 7,989,812,303.06/42,315.75
6. Step 6: Final answer
   x = 188,814.15