Finding the Third Proportional to 42,359.81 and 56,473.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,359.81 : 56,473.31 = 56,473.31 : x
2. Step 2: Convert to fraction form
   42,359.81/56,473.31 = 56,473.31/x
3. Step 3: Cross multiply
   42,359.81x = 56,473.31 × 56,473.31
4. Step 4: Simplify right side
   42,359.81x = 3,189,235,024.72
5. Step 5: Solve for x
   x = 3,189,235,024.72/42,359.81
6. Step 6: Final answer
   x = 75,289.17