Finding the Fourth Proportional to 78,109.40, 107,791.08 and 42,299.46

Step by Step Solution

1. Step 1: Write the proportion equation
   78,109.40 : 107,791.08 = 42,299.46 : x
2. Step 2: Convert to fraction form
   78,109.40/107,791.08 = 42,299.46/x
3. Step 3: Cross multiply
   78,109.40x = 107,791.08 × 42,299.46
4. Step 4: Simplify right side
   78,109.40x = 4,559,504,476.82
5. Step 5: Solve for x
   x = 4,559,504,476.82/78,109.40
6. Step 6: Final answer
   x = 58,373.31