Finding the Fourth Proportional to 71,339.48, 107,009.72 and 21,419.96

Step by Step Solution

1. Step 1: Write the proportion equation
   71,339.48 : 107,009.72 = 21,419.96 : x
2. Step 2: Convert to fraction form
   71,339.48/107,009.72 = 21,419.96/x
3. Step 3: Cross multiply
   71,339.48x = 107,009.72 × 21,419.96
4. Step 4: Simplify right side
   71,339.48x = 2,292,143,922.01
5. Step 5: Solve for x
   x = 2,292,143,922.01/71,339.48
6. Step 6: Final answer
   x = 32,130.09