Finding the Fourth Proportional to 64,547.43, 89,039.49 and 59,980.73

Step by Step Solution

1. Step 1: Write the proportion equation
   64,547.43 : 89,039.49 = 59,980.73 : x
2. Step 2: Convert to fraction form
   64,547.43/89,039.49 = 59,980.73/x
3. Step 3: Cross multiply
   64,547.43x = 89,039.49 × 59,980.73
4. Step 4: Simplify right side
   64,547.43x = 5,340,653,163.83
5. Step 5: Solve for x
   x = 5,340,653,163.83/64,547.43
6. Step 6: Final answer
   x = 82,739.98