Finding the Fourth Proportional to 78,182.42, 107,890.79 and 42,371.91

Step by Step Solution

1. Step 1: Write the proportion equation
   78,182.42 : 107,890.79 = 42,371.91 : x
2. Step 2: Convert to fraction form
   78,182.42/107,890.79 = 42,371.91/x
3. Step 3: Cross multiply
   78,182.42x = 107,890.79 × 42,371.91
4. Step 4: Simplify right side
   78,182.42x = 4,571,538,631.85
5. Step 5: Solve for x
   x = 4,571,538,631.85/78,182.42
6. Step 6: Final answer
   x = 58,472.72