Finding the Fourth Proportional to 123,640.38, 185,333.34 and 56,219.31

Step by Step Solution

1. Step 1: Write the proportion equation
   123,640.38 : 185,333.34 = 56,219.31 : x
2. Step 2: Convert to fraction form
   123,640.38/185,333.34 = 56,219.31/x
3. Step 3: Cross multiply
   123,640.38x = 185,333.34 × 56,219.31
4. Step 4: Simplify right side
   123,640.38x = 10,419,312,494.80
5. Step 5: Solve for x
   x = 10,419,312,494.80/123,640.38
6. Step 6: Final answer
   x = 84,271.11