Finding the Fourth Proportional to 77,139.84, 106,499.43 and 50,328.84

Step by Step Solution

1. Step 1: Write the proportion equation
   77,139.84 : 106,499.43 = 50,328.84 : x
2. Step 2: Convert to fraction form
   77,139.84/106,499.43 = 50,328.84/x
3. Step 3: Cross multiply
   77,139.84x = 106,499.43 × 50,328.84
4. Step 4: Simplify right side
   77,139.84x = 5,359,992,772.56
5. Step 5: Solve for x
   x = 5,359,992,772.56/77,139.84
6. Step 6: Final answer
   x = 69,484.11