Finding the Fourth Proportional to 78,579.67, 108,442.61 and 42,770.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,579.67 : 108,442.61 = 42,770.98 : x
2. Step 2: Convert to fraction form
   78,579.67/108,442.61 = 42,770.98/x
3. Step 3: Cross multiply
   78,579.67x = 108,442.61 × 42,770.98
4. Step 4: Simplify right side
   78,579.67x = 4,638,196,703.46
5. Step 5: Solve for x
   x = 4,638,196,703.46/78,579.67
6. Step 6: Final answer
   x = 59,025.40