Finding the Fourth Proportional to 78,109.98, 117,140.72 and 28,183.58

Step by Step Solution

1. Step 1: Write the proportion equation
   78,109.98 : 117,140.72 = 28,183.58 : x
2. Step 2: Convert to fraction form
   78,109.98/117,140.72 = 28,183.58/x
3. Step 3: Cross multiply
   78,109.98x = 117,140.72 × 28,183.58
4. Step 4: Simplify right side
   78,109.98x = 3,301,444,267.67
5. Step 5: Solve for x
   x = 3,301,444,267.67/78,109.98
6. Step 6: Final answer
   x = 42,266.61