Finding the Fourth Proportional to 69,942.10, 104,956.89 and 28,389.10

Step by Step Solution

1. Step 1: Write the proportion equation
   69,942.10 : 104,956.89 = 28,389.10 : x
2. Step 2: Convert to fraction form
   69,942.10/104,956.89 = 28,389.10/x
3. Step 3: Cross multiply
   69,942.10x = 104,956.89 × 28,389.10
4. Step 4: Simplify right side
   69,942.10x = 2,979,631,645.90
5. Step 5: Solve for x
   x = 2,979,631,645.90/69,942.10
6. Step 6: Final answer
   x = 42,601.40