Finding the Fourth Proportional to 77,419.47, 106,736.61 and 50,515.27

Step by Step Solution

1. Step 1: Write the proportion equation
   77,419.47 : 106,736.61 = 50,515.27 : x
2. Step 2: Convert to fraction form
   77,419.47/106,736.61 = 50,515.27/x
3. Step 3: Cross multiply
   77,419.47x = 106,736.61 × 50,515.27
4. Step 4: Simplify right side
   77,419.47x = 5,391,828,673.03
5. Step 5: Solve for x
   x = 5,391,828,673.03/77,419.47
6. Step 6: Final answer
   x = 69,644.35