Finding the Fourth Proportional to 64,976.64, 89,682.57 and 42,275.58

Step by Step Solution

1. Step 1: Write the proportion equation
   64,976.64 : 89,682.57 = 42,275.58 : x
2. Step 2: Convert to fraction form
   64,976.64/89,682.57 = 42,275.58/x
3. Step 3: Cross multiply
   64,976.64x = 89,682.57 × 42,275.58
4. Step 4: Simplify right side
   64,976.64x = 3,791,382,662.64
5. Step 5: Solve for x
   x = 3,791,382,662.64/64,976.64
6. Step 6: Final answer
   x = 58,349.93