Finding the Fourth Proportional to 34,285.68, 47,321.82 and 21,708

Step by Step Solution

1. Step 1: Write the proportion equation
   34,285.68 : 47,321.82 = 21,708 : x
2. Step 2: Convert to fraction form
   34,285.68/47,321.82 = 21,708/x
3. Step 3: Cross multiply
   34,285.68x = 47,321.82 × 21,708
4. Step 4: Simplify right side
   34,285.68x = 1,027,262,068.56
5. Step 5: Solve for x
   x = 1,027,262,068.56/34,285.68
6. Step 6: Final answer
   x = 29,961.84