Finding the Fourth Proportional to 78,107.86, 107,788.90 and 42,297.91

Step by Step Solution

1. Step 1: Write the proportion equation
   78,107.86 : 107,788.90 = 42,297.91 : x
2. Step 2: Convert to fraction form
   78,107.86/107,788.90 = 42,297.91/x
3. Step 3: Cross multiply
   78,107.86x = 107,788.90 × 42,297.91
4. Step 4: Simplify right side
   78,107.86x = 4,559,245,191.20
5. Step 5: Solve for x
   x = 4,559,245,191.20/78,107.86
6. Step 6: Final answer
   x = 58,371.14