Finding the Fourth Proportional to 57,469.80, 79,358.16 and 42,388.60

Step by Step Solution

1. Step 1: Write the proportion equation
   57,469.80 : 79,358.16 = 42,388.60 : x
2. Step 2: Convert to fraction form
   57,469.80/79,358.16 = 42,388.60/x
3. Step 3: Cross multiply
   57,469.80x = 79,358.16 × 42,388.60
4. Step 4: Simplify right side
   57,469.80x = 3,363,881,300.98
5. Step 5: Solve for x
   x = 3,363,881,300.98/57,469.80
6. Step 6: Final answer
   x = 58,533.03