Finding the Fourth Proportional to 78,178.86, 107,886.56 and 42,369.75

Step by Step Solution

1. Step 1: Write the proportion equation
   78,178.86 : 107,886.56 = 42,369.75 : x
2. Step 2: Convert to fraction form
   78,178.86/107,886.56 = 42,369.75/x
3. Step 3: Cross multiply
   78,178.86x = 107,886.56 × 42,369.75
4. Step 4: Simplify right side
   78,178.86x = 4,571,126,363.71
5. Step 5: Solve for x
   x = 4,571,126,363.71/78,178.86
6. Step 6: Final answer
   x = 58,470.11