Finding the Fourth Proportional to 77,879.42, 107,473.53 and 42,069.42

Step by Step Solution

1. Step 1: Write the proportion equation
   77,879.42 : 107,473.53 = 42,069.42 : x
2. Step 2: Convert to fraction form
   77,879.42/107,473.53 = 42,069.42/x
3. Step 3: Cross multiply
   77,879.42x = 107,473.53 × 42,069.42
4. Step 4: Simplify right side
   77,879.42x = 4,521,349,072.45
5. Step 5: Solve for x
   x = 4,521,349,072.45/77,879.42
6. Step 6: Final answer
   x = 58,055.76