Finding the Fourth Proportional to 78,006.98, 107,649.60 and 42,196.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78,006.98 : 107,649.60 = 42,196.94 : x
2. Step 2: Convert to fraction form
   78,006.98/107,649.60 = 42,196.94/x
3. Step 3: Cross multiply
   78,006.98x = 107,649.60 × 42,196.94
4. Step 4: Simplify right side
   78,006.98x = 4,542,483,712.22
5. Step 5: Solve for x
   x = 4,542,483,712.22/78,006.98
6. Step 6: Final answer
   x = 58,231.76