Finding the Fourth Proportional to 72,648.74, 100,299.98 and 57,602.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,648.74 : 100,299.98 = 57,602.18 : x
2. Step 2: Convert to fraction form
   72,648.74/100,299.98 = 57,602.18/x
3. Step 3: Cross multiply
   72,648.74x = 100,299.98 × 57,602.18
4. Step 4: Simplify right side
   72,648.74x = 5,777,497,144.46
5. Step 5: Solve for x
   x = 5,777,497,144.46/72,648.74
6. Step 6: Final answer
   x = 79,526.47