Finding the Third Proportional to 42,814.50 and 56,809.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,814.50 : 56,809.75 = 56,809.75 : x
2. Step 2: Convert to fraction form
   42,814.50/56,809.75 = 56,809.75/x
3. Step 3: Cross multiply
   42,814.50x = 56,809.75 × 56,809.75
4. Step 4: Simplify right side
   42,814.50x = 3,227,347,695.06
5. Step 5: Solve for x
   x = 3,227,347,695.06/42,814.50
6. Step 6: Final answer
   x = 75,379.78