Finding the Fourth Proportional to 72,419.77, 108,134.23 and 64,874.62

Step by Step Solution

1. Step 1: Write the proportion equation
   72,419.77 : 108,134.23 = 64,874.62 : x
2. Step 2: Convert to fraction form
   72,419.77/108,134.23 = 64,874.62/x
3. Step 3: Cross multiply
   72,419.77x = 108,134.23 × 64,874.62
4. Step 4: Simplify right side
   72,419.77x = 7,015,167,242.43
5. Step 5: Solve for x
   x = 7,015,167,242.43/72,419.77
6. Step 6: Final answer
   x = 96,868.12