Finding the Third Proportional to 30,415.88 and 40,685.63

Step by Step Solution

1. Step 1: Write the proportion equation
   30,415.88 : 40,685.63 = 40,685.63 : x
2. Step 2: Convert to fraction form
   30,415.88/40,685.63 = 40,685.63/x
3. Step 3: Cross multiply
   30,415.88x = 40,685.63 × 40,685.63
4. Step 4: Simplify right side
   30,415.88x = 1,655,320,081.64
5. Step 5: Solve for x
   x = 1,655,320,081.64/30,415.88
6. Step 6: Final answer
   x = 54,422.90