Finding the Fourth Proportional to 74,456.42, 111,692.82 and 21,870

Step by Step Solution

1. Step 1: Write the proportion equation
   74,456.42 : 111,692.82 = 21,870 : x
2. Step 2: Convert to fraction form
   74,456.42/111,692.82 = 21,870/x
3. Step 3: Cross multiply
   74,456.42x = 111,692.82 × 21,870
4. Step 4: Simplify right side
   74,456.42x = 2,442,722,055.41
5. Step 5: Solve for x
   x = 2,442,722,055.41/74,456.42
6. Step 6: Final answer
   x = 32,807.41