Finding the Fourth Proportional to 76,797.27, 105,978.62 and 42,805.62

Step by Step Solution

1. Step 1: Write the proportion equation
   76,797.27 : 105,978.62 = 42,805.62 : x
2. Step 2: Convert to fraction form
   76,797.27/105,978.62 = 42,805.62/x
3. Step 3: Cross multiply
   76,797.27x = 105,978.62 × 42,805.62
4. Step 4: Simplify right side
   76,797.27x = 4,536,480,321.82
5. Step 5: Solve for x
   x = 4,536,480,321.82/76,797.27
6. Step 6: Final answer
   x = 59,070.85