Finding the Third Proportional to 13,437.56 and 31,378.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,437.56 : 31,378.78 = 31,378.78 : x
2. Step 2: Convert to fraction form
   13,437.56/31,378.78 = 31,378.78/x
3. Step 3: Cross multiply
   13,437.56x = 31,378.78 × 31,378.78
4. Step 4: Simplify right side
   13,437.56x = 984,627,912.74
5. Step 5: Solve for x
   x = 984,627,912.74/13,437.56
6. Step 6: Final answer
   x = 73,274.29