Finding the Fourth Proportional to 76,796.74, 105,979.98 and 42,807.38

Step by Step Solution

1. Step 1: Write the proportion equation
   76,796.74 : 105,979.98 = 42,807.38 : x
2. Step 2: Convert to fraction form
   76,796.74/105,979.98 = 42,807.38/x
3. Step 3: Cross multiply
   76,796.74x = 105,979.98 × 42,807.38
4. Step 4: Simplify right side
   76,796.74x = 4,536,724,746.35
5. Step 5: Solve for x
   x = 4,536,724,746.35/76,796.74
6. Step 6: Final answer
   x = 59,074.45