Finding the Fourth Proportional to 78,801.55, 108,745.99 and 42,991.58

Step by Step Solution

1. Step 1: Write the proportion equation
   78,801.55 : 108,745.99 = 42,991.58 : x
2. Step 2: Convert to fraction form
   78,801.55/108,745.99 = 42,991.58/x
3. Step 3: Cross multiply
   78,801.55x = 108,745.99 × 42,991.58
4. Step 4: Simplify right side
   78,801.55x = 4,675,162,093.15
5. Step 5: Solve for x
   x = 4,675,162,093.15/78,801.55
6. Step 6: Final answer
   x = 59,328.30