Finding the Fourth Proportional to 34,445.25, 47,538.09 and 21,870

Step by Step Solution

1. Step 1: Write the proportion equation
   34,445.25 : 47,538.09 = 21,870 : x
2. Step 2: Convert to fraction form
   34,445.25/47,538.09 = 21,870/x
3. Step 3: Cross multiply
   34,445.25x = 47,538.09 × 21,870
4. Step 4: Simplify right side
   34,445.25x = 1,039,658,028.30
5. Step 5: Solve for x
   x = 1,039,658,028.30/34,445.25
6. Step 6: Final answer
   x = 30,182.91