Finding the Fourth Proportional to 42,379.83, 58,494.92 and 28,956.51

Step by Step Solution

1. Step 1: Write the proportion equation
   42,379.83 : 58,494.92 = 28,956.51 : x
2. Step 2: Convert to fraction form
   42,379.83/58,494.92 = 28,956.51/x
3. Step 3: Cross multiply
   42,379.83x = 58,494.92 × 28,956.51
4. Step 4: Simplify right side
   42,379.83x = 1,693,808,591.15
5. Step 5: Solve for x
   x = 1,693,808,591.15/42,379.83
6. Step 6: Final answer
   x = 39,967.33