Finding the Fourth Proportional to 76,789.32, 105,965.92 and 42,799.19

Step by Step Solution

1. Step 1: Write the proportion equation
   76,789.32 : 105,965.92 = 42,799.19 : x
2. Step 2: Convert to fraction form
   76,789.32/105,965.92 = 42,799.19/x
3. Step 3: Cross multiply
   76,789.32x = 105,965.92 × 42,799.19
4. Step 4: Simplify right side
   76,789.32x = 4,535,255,067.27
5. Step 5: Solve for x
   x = 4,535,255,067.27/76,789.32
6. Step 6: Final answer
   x = 59,061.02