Finding the Fourth Proportional to 64,458.24, 96,428.91 and 53,386.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,458.24 : 96,428.91 = 53,386.50 : x
2. Step 2: Convert to fraction form
   64,458.24/96,428.91 = 53,386.50/x
3. Step 3: Cross multiply
   64,458.24x = 96,428.91 × 53,386.50
4. Step 4: Simplify right side
   64,458.24x = 5,148,002,003.72
5. Step 5: Solve for x
   x = 5,148,002,003.72/64,458.24
6. Step 6: Final answer
   x = 79,865.69