Finding the Fourth Proportional to 57,931.04, 79,903.55 and 53,166.42

Step by Step Solution

1. Step 1: Write the proportion equation
   57,931.04 : 79,903.55 = 53,166.42 : x
2. Step 2: Convert to fraction form
   57,931.04/79,903.55 = 53,166.42/x
3. Step 3: Cross multiply
   57,931.04x = 79,903.55 × 53,166.42
4. Step 4: Simplify right side
   57,931.04x = 4,248,185,432.96
5. Step 5: Solve for x
   x = 4,248,185,432.96/57,931.04
6. Step 6: Final answer
   x = 73,331.77