Finding the Fourth Proportional to 105,915.25, 146,162.48 and 57,516.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,915.25 : 146,162.48 = 57,516.76 : x
2. Step 2: Convert to fraction form
   105,915.25/146,162.48 = 57,516.76/x
3. Step 3: Cross multiply
   105,915.25x = 146,162.48 × 57,516.76
4. Step 4: Simplify right side
   105,915.25x = 8,406,791,878.85
5. Step 5: Solve for x
   x = 8,406,791,878.85/105,915.25
6. Step 6: Final answer
   x = 79,372.82