Finding the Fourth Proportional to 78,105.86, 107,786.15 and 42,295.91

Step by Step Solution

1. Step 1: Write the proportion equation
   78,105.86 : 107,786.15 = 42,295.91 : x
2. Step 2: Convert to fraction form
   78,105.86/107,786.15 = 42,295.91/x
3. Step 3: Cross multiply
   78,105.86x = 107,786.15 × 42,295.91
4. Step 4: Simplify right side
   78,105.86x = 4,558,912,549.24
5. Step 5: Solve for x
   x = 4,558,912,549.24/78,105.86
6. Step 6: Final answer
   x = 58,368.38