Finding the Fourth Proportional to 22,071.78, 30,429.21 and 14,985.90

Step by Step Solution

1. Step 1: Write the proportion equation
   22,071.78 : 30,429.21 = 14,985.90 : x
2. Step 2: Convert to fraction form
   22,071.78/30,429.21 = 14,985.90/x
3. Step 3: Cross multiply
   22,071.78x = 30,429.21 × 14,985.90
4. Step 4: Simplify right side
   22,071.78x = 456,009,098.14
5. Step 5: Solve for x
   x = 456,009,098.14/22,071.78
6. Step 6: Final answer
   x = 20,660.28