Finding the Fourth Proportional to 21,070.38, 31,602.15 and 7,029.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,070.38 : 31,602.15 = 7,029.84 : x
2. Step 2: Convert to fraction form
   21,070.38/31,602.15 = 7,029.84/x
3. Step 3: Cross multiply
   21,070.38x = 31,602.15 × 7,029.84
4. Step 4: Simplify right side
   21,070.38x = 222,157,998.90
5. Step 5: Solve for x
   x = 222,157,998.90/21,070.38
6. Step 6: Final answer
   x = 10,543.62