Finding the Fourth Proportional to 57,660, 79,570.80 and 31,164

Step by Step Solution

1. Step 1: Write the proportion equation
   57,660 : 79,570.80 = 31,164 : x
2. Step 2: Convert to fraction form
   57,660/79,570.80 = 31,164/x
3. Step 3: Cross multiply
   57,660x = 79,570.80 × 31,164
4. Step 4: Simplify right side
   57,660x = 2,479,744,411.20
5. Step 5: Solve for x
   x = 2,479,744,411.20/57,660
6. Step 6: Final answer
   x = 43,006.32