Finding the Fourth Proportional to 77,388.97, 106,819.59 and 50,535.67

Step by Step Solution

1. Step 1: Write the proportion equation
   77,388.97 : 106,819.59 = 50,535.67 : x
2. Step 2: Convert to fraction form
   77,388.97/106,819.59 = 50,535.67/x
3. Step 3: Cross multiply
   77,388.97x = 106,819.59 × 50,535.67
4. Step 4: Simplify right side
   77,388.97x = 5,398,199,549.78
5. Step 5: Solve for x
   x = 5,398,199,549.78/77,388.97
6. Step 6: Final answer
   x = 69,754.12