Finding the Fourth Proportional to 71,898.82, 107,848.50 and 21,978.73

Step by Step Solution

1. Step 1: Write the proportion equation
   71,898.82 : 107,848.50 = 21,978.73 : x
2. Step 2: Convert to fraction form
   71,898.82/107,848.50 = 21,978.73/x
3. Step 3: Cross multiply
   71,898.82x = 107,848.50 × 21,978.73
4. Step 4: Simplify right side
   71,898.82x = 2,370,373,062.41
5. Step 5: Solve for x
   x = 2,370,373,062.41/71,898.82
6. Step 6: Final answer
   x = 32,968.18