Finding the Third Proportional to 40,839.19 and 55,426.78

Step by Step Solution

1. Step 1: Write the proportion equation
   40,839.19 : 55,426.78 = 55,426.78 : x
2. Step 2: Convert to fraction form
   40,839.19/55,426.78 = 55,426.78/x
3. Step 3: Cross multiply
   40,839.19x = 55,426.78 × 55,426.78
4. Step 4: Simplify right side
   40,839.19x = 3,072,128,079.74
5. Step 5: Solve for x
   x = 3,072,128,079.74/40,839.19
6. Step 6: Final answer
   x = 75,225.00