Finding the Fourth Proportional to 78,109.85, 107,791.38 and 42,299.85

Step by Step Solution

1. Step 1: Write the proportion equation
   78,109.85 : 107,791.38 = 42,299.85 : x
2. Step 2: Convert to fraction form
   78,109.85/107,791.38 = 42,299.85/x
3. Step 3: Cross multiply
   78,109.85x = 107,791.38 × 42,299.85
4. Step 4: Simplify right side
   78,109.85x = 4,559,559,609.51
5. Step 5: Solve for x
   x = 4,559,559,609.51/78,109.85
6. Step 6: Final answer
   x = 58,373.68