Finding the Fourth Proportional to 72,257.79, 99,742.50 and 54,404.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72,257.79 : 99,742.50 = 54,404.58 : x
2. Step 2: Convert to fraction form
   72,257.79/99,742.50 = 54,404.58/x
3. Step 3: Cross multiply
   72,257.79x = 99,742.50 × 54,404.58
4. Step 4: Simplify right side
   72,257.79x = 5,426,448,820.65
5. Step 5: Solve for x
   x = 5,426,448,820.65/72,257.79
6. Step 6: Final answer
   x = 75,098.46