Finding the Fourth Proportional to 76,788.29, 105,976.44 and 42,799.88

Step by Step Solution

1. Step 1: Write the proportion equation
   76,788.29 : 105,976.44 = 42,799.88 : x
2. Step 2: Convert to fraction form
   76,788.29/105,976.44 = 42,799.88/x
3. Step 3: Cross multiply
   76,788.29x = 105,976.44 × 42,799.88
4. Step 4: Simplify right side
   76,788.29x = 4,535,778,384.95
5. Step 5: Solve for x
   x = 4,535,778,384.95/76,788.29
6. Step 6: Final answer
   x = 59,068.62