Finding the Fourth Proportional to 72,218.01, 107,847.16 and 71,436.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72,218.01 : 107,847.16 = 71,436.09 : x
2. Step 2: Convert to fraction form
   72,218.01/107,847.16 = 71,436.09/x
3. Step 3: Cross multiply
   72,218.01x = 107,847.16 × 71,436.09
4. Step 4: Simplify right side
   72,218.01x = 7,704,179,428.00
5. Step 5: Solve for x
   x = 7,704,179,428.00/72,218.01
6. Step 6: Final answer
   x = 106,679.48