Finding the Fourth Proportional to 79,539, 109,673.64 and 50,820.72

Step by Step Solution

1. Step 1: Write the proportion equation
   79,539 : 109,673.64 = 50,820.72 : x
2. Step 2: Convert to fraction form
   79,539/109,673.64 = 50,820.72/x
3. Step 3: Cross multiply
   79,539x = 109,673.64 × 50,820.72
4. Step 4: Simplify right side
   79,539x = 5,573,693,349.82
5. Step 5: Solve for x
   x = 5,573,693,349.82/79,539
6. Step 6: Final answer
   x = 70,074.97