Finding the Fourth Proportional to 21,016.52, 29,004.83 and 15,702.11

Step by Step Solution

1. Step 1: Write the proportion equation
   21,016.52 : 29,004.83 = 15,702.11 : x
2. Step 2: Convert to fraction form
   21,016.52/29,004.83 = 15,702.11/x
3. Step 3: Cross multiply
   21,016.52x = 29,004.83 × 15,702.11
4. Step 4: Simplify right side
   21,016.52x = 455,436,807.66
5. Step 5: Solve for x
   x = 455,436,807.66/21,016.52
6. Step 6: Final answer
   x = 21,670.42