Finding the Third Proportional to 56,442 and 123,378.56

Step by Step Solution

1. Step 1: Write the proportion equation
   56,442 : 123,378.56 = 123,378.56 : x
2. Step 2: Convert to fraction form
   56,442/123,378.56 = 123,378.56/x
3. Step 3: Cross multiply
   56,442x = 123,378.56 × 123,378.56
4. Step 4: Simplify right side
   56,442x = 15,222,269,684.57
5. Step 5: Solve for x
   x = 15,222,269,684.57/56,442
6. Step 6: Final answer
   x = 269,697.56