Finding the Third Proportional to 38,990.88 and 55,715.75

Step by Step Solution

1. Step 1: Write the proportion equation
   38,990.88 : 55,715.75 = 55,715.75 : x
2. Step 2: Convert to fraction form
   38,990.88/55,715.75 = 55,715.75/x
3. Step 3: Cross multiply
   38,990.88x = 55,715.75 × 55,715.75
4. Step 4: Simplify right side
   38,990.88x = 3,104,244,798.06
5. Step 5: Solve for x
   x = 3,104,244,798.06/38,990.88
6. Step 6: Final answer
   x = 79,614.65