Finding the Fourth Proportional to 76,798.91, 105,969.62 and 42,799.95

Step by Step Solution

1. Step 1: Write the proportion equation
   76,798.91 : 105,969.62 = 42,799.95 : x
2. Step 2: Convert to fraction form
   76,798.91/105,969.62 = 42,799.95/x
3. Step 3: Cross multiply
   76,798.91x = 105,969.62 × 42,799.95
4. Step 4: Simplify right side
   76,798.91x = 4,535,494,544.52
5. Step 5: Solve for x
   x = 4,535,494,544.52/76,798.91
6. Step 6: Final answer
   x = 59,056.75