Finding the Fourth Proportional to 64,995.69, 89,643.06 and 42,341.79

Step by Step Solution

1. Step 1: Write the proportion equation
   64,995.69 : 89,643.06 = 42,341.79 : x
2. Step 2: Convert to fraction form
   64,995.69/89,643.06 = 42,341.79/x
3. Step 3: Cross multiply
   64,995.69x = 89,643.06 × 42,341.79
4. Step 4: Simplify right side
   64,995.69x = 3,795,647,621.48
5. Step 5: Solve for x
   x = 3,795,647,621.48/64,995.69
6. Step 6: Final answer
   x = 58,398.45