Finding the Third Proportional to 42,150 and 56,379

Step by Step Solution

1. Step 1: Write the proportion equation
   42,150 : 56,379 = 56,379 : x
2. Step 2: Convert to fraction form
   42,150/56,379 = 56,379/x
3. Step 3: Cross multiply
   42,150x = 56,379 × 56,379
4. Step 4: Simplify right side
   42,150x = 3,178,591,641
5. Step 5: Solve for x
   x = 3,178,591,641/42,150
6. Step 6: Final answer
   x = 75,411.43