Finding the Fourth Proportional to 72,898.88, 108,948.89 and 53,218.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,898.88 : 108,948.89 = 53,218.88 : x
2. Step 2: Convert to fraction form
   72,898.88/108,948.89 = 53,218.88/x
3. Step 3: Cross multiply
   72,898.88x = 108,948.89 × 53,218.88
4. Step 4: Simplify right side
   72,898.88x = 5,798,137,903.04
5. Step 5: Solve for x
   x = 5,798,137,903.04/72,898.88
6. Step 6: Final answer
   x = 79,536.72