Finding the Fourth Proportional to 76,915.72, 106,143.78 and 43,381.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,915.72 : 106,143.78 = 43,381.72 : x
2. Step 2: Convert to fraction form
   76,915.72/106,143.78 = 43,381.72/x
3. Step 3: Cross multiply
   76,915.72x = 106,143.78 × 43,381.72
4. Step 4: Simplify right side
   76,915.72x = 4,604,699,743.70
5. Step 5: Solve for x
   x = 4,604,699,743.70/76,915.72
6. Step 6: Final answer
   x = 59,866.82