Finding the Fourth Proportional to 76,145.38, 105,128.28 and 48,932.48

Step by Step Solution

1. Step 1: Write the proportion equation
   76,145.38 : 105,128.28 = 48,932.48 : x
2. Step 2: Convert to fraction form
   76,145.38/105,128.28 = 48,932.48/x
3. Step 3: Cross multiply
   76,145.38x = 105,128.28 × 48,932.48
4. Step 4: Simplify right side
   76,145.38x = 5,144,187,458.53
5. Step 5: Solve for x
   x = 5,144,187,458.53/76,145.38
6. Step 6: Final answer
   x = 67,557.45