Finding the Fourth Proportional to 76,798.82, 105,978.96 and 42,811.02

Step by Step Solution

1. Step 1: Write the proportion equation
   76,798.82 : 105,978.96 = 42,811.02 : x
2. Step 2: Convert to fraction form
   76,798.82/105,978.96 = 42,811.02/x
3. Step 3: Cross multiply
   76,798.82x = 105,978.96 × 42,811.02
4. Step 4: Simplify right side
   76,798.82x = 4,537,067,376.14
5. Step 5: Solve for x
   x = 4,537,067,376.14/76,798.82
6. Step 6: Final answer
   x = 59,077.31