Finding the Fourth Proportional to 64,922.18, 89,392.78 and 55,340.58

Step by Step Solution

1. Step 1: Write the proportion equation
   64,922.18 : 89,392.78 = 55,340.58 : x
2. Step 2: Convert to fraction form
   64,922.18/89,392.78 = 55,340.58/x
3. Step 3: Cross multiply
   64,922.18x = 89,392.78 × 55,340.58
4. Step 4: Simplify right side
   64,922.18x = 4,947,048,293.01
5. Step 5: Solve for x
   x = 4,947,048,293.01/64,922.18
6. Step 6: Final answer
   x = 76,199.66