Finding the Fourth Proportional to 84,019.86, 126,029.82 and 21,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   84,019.86 : 126,029.82 = 21,685.50 : x
2. Step 2: Convert to fraction form
   84,019.86/126,029.82 = 21,685.50/x
3. Step 3: Cross multiply
   84,019.86x = 126,029.82 × 21,685.50
4. Step 4: Simplify right side
   84,019.86x = 2,733,019,661.61
5. Step 5: Solve for x
   x = 2,733,019,661.61/84,019.86
6. Step 6: Final answer
   x = 32,528.26