Finding the Fourth Proportional to 76,214, 105,164.79 and 42,214.05

Step by Step Solution

1. Step 1: Write the proportion equation
   76,214 : 105,164.79 = 42,214.05 : x
2. Step 2: Convert to fraction form
   76,214/105,164.79 = 42,214.05/x
3. Step 3: Cross multiply
   76,214x = 105,164.79 × 42,214.05
4. Step 4: Simplify right side
   76,214x = 4,439,431,703.30
5. Step 5: Solve for x
   x = 4,439,431,703.30/76,214
6. Step 6: Final answer
   x = 58,249.56