Finding the Third Proportional to 38,916 and 55,458

Step by Step Solution

1. Step 1: Write the proportion equation
   38,916 : 55,458 = 55,458 : x
2. Step 2: Convert to fraction form
   38,916/55,458 = 55,458/x
3. Step 3: Cross multiply
   38,916x = 55,458 × 55,458
4. Step 4: Simplify right side
   38,916x = 3,075,589,764
5. Step 5: Solve for x
   x = 3,075,589,764/38,916
6. Step 6: Final answer
   x = 79,031.50