Finding the Fourth Proportional to 79,983.78, 120,048.39 and 42,575.15

Step by Step Solution

1. Step 1: Write the proportion equation
   79,983.78 : 120,048.39 = 42,575.15 : x
2. Step 2: Convert to fraction form
   79,983.78/120,048.39 = 42,575.15/x
3. Step 3: Cross multiply
   79,983.78x = 120,048.39 × 42,575.15
4. Step 4: Simplify right side
   79,983.78x = 5,111,077,611.27
5. Step 5: Solve for x
   x = 5,111,077,611.27/79,983.78
6. Step 6: Final answer
   x = 63,901.43