Finding the Fourth Proportional to 78,167.60, 107,871.72 and 42,357.64

Step by Step Solution

1. Step 1: Write the proportion equation
   78,167.60 : 107,871.72 = 42,357.64 : x
2. Step 2: Convert to fraction form
   78,167.60/107,871.72 = 42,357.64/x
3. Step 3: Cross multiply
   78,167.60x = 107,871.72 × 42,357.64
4. Step 4: Simplify right side
   78,167.60x = 4,569,191,481.94
5. Step 5: Solve for x
   x = 4,569,191,481.94/78,167.60
6. Step 6: Final answer
   x = 58,453.78