Finding the Fourth Proportional to 78,811.52, 108,774.40 and 50,528.64

Step by Step Solution

1. Step 1: Write the proportion equation
   78,811.52 : 108,774.40 = 50,528.64 : x
2. Step 2: Convert to fraction form
   78,811.52/108,774.40 = 50,528.64/x
3. Step 3: Cross multiply
   78,811.52x = 108,774.40 × 50,528.64
4. Step 4: Simplify right side
   78,811.52x = 5,496,222,498.82
5. Step 5: Solve for x
   x = 5,496,222,498.82/78,811.52
6. Step 6: Final answer
   x = 69,738.82