Finding the Fourth Proportional to 76,788.06, 105,976.13 and 42,799.65

Step by Step Solution

1. Step 1: Write the proportion equation
   76,788.06 : 105,976.13 = 42,799.65 : x
2. Step 2: Convert to fraction form
   76,788.06/105,976.13 = 42,799.65/x
3. Step 3: Cross multiply
   76,788.06x = 105,976.13 × 42,799.65
4. Step 4: Simplify right side
   76,788.06x = 4,535,741,272.35
5. Step 5: Solve for x
   x = 4,535,741,272.35/76,788.06
6. Step 6: Final answer
   x = 59,068.31