Finding the Fourth Proportional to 78,013.51, 116,949.18 and 28,081.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,013.51 : 116,949.18 = 28,081.87 : x
2. Step 2: Convert to fraction form
   78,013.51/116,949.18 = 28,081.87/x
3. Step 3: Cross multiply
   78,013.51x = 116,949.18 × 28,081.87
4. Step 4: Simplify right side
   78,013.51x = 3,284,151,669.37
5. Step 5: Solve for x
   x = 3,284,151,669.37/78,013.51
6. Step 6: Final answer
   x = 42,097.22