Finding the Fourth Proportional to 79,005.78, 108,841.32 and 55,089.72

Step by Step Solution

1. Step 1: Write the proportion equation
   79,005.78 : 108,841.32 = 55,089.72 : x
2. Step 2: Convert to fraction form
   79,005.78/108,841.32 = 55,089.72/x
3. Step 3: Cross multiply
   79,005.78x = 108,841.32 × 55,089.72
4. Step 4: Simplify right side
   79,005.78x = 5,996,037,843.23
5. Step 5: Solve for x
   x = 5,996,037,843.23/79,005.78
6. Step 6: Final answer
   x = 75,893.66