Finding the Fourth Proportional to 76,965.69, 106,211.55 and 42,974.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,965.69 : 106,211.55 = 42,974.72 : x
2. Step 2: Convert to fraction form
   76,965.69/106,211.55 = 42,974.72/x
3. Step 3: Cross multiply
   76,965.69x = 106,211.55 × 42,974.72
4. Step 4: Simplify right side
   76,965.69x = 4,564,411,090.96
5. Step 5: Solve for x
   x = 4,564,411,090.96/76,965.69
6. Step 6: Final answer
   x = 59,304.49