Finding the Fourth Proportional to 76,963.69, 106,208.80 and 42,972.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,963.69 : 106,208.80 = 42,972.72 : x
2. Step 2: Convert to fraction form
   76,963.69/106,208.80 = 42,972.72/x
3. Step 3: Cross multiply
   76,963.69x = 106,208.80 × 42,972.72
4. Step 4: Simplify right side
   76,963.69x = 4,564,081,023.94
5. Step 5: Solve for x
   x = 4,564,081,023.94/76,963.69
6. Step 6: Final answer
   x = 59,301.74