Finding the Fourth Proportional to 64,955.57, 89,568.42 and 56,384.23

Step by Step Solution

1. Step 1: Write the proportion equation
   64,955.57 : 89,568.42 = 56,384.23 : x
2. Step 2: Convert to fraction form
   64,955.57/89,568.42 = 56,384.23/x
3. Step 3: Cross multiply
   64,955.57x = 89,568.42 × 56,384.23
4. Step 4: Simplify right side
   64,955.57x = 5,050,246,170.10
5. Step 5: Solve for x
   x = 5,050,246,170.10/64,955.57
6. Step 6: Final answer
   x = 77,749.25