Finding the Fourth Proportional to 118,300.69, 163,255.26 and 64,586.15

Step by Step Solution

1. Step 1: Write the proportion equation
   118,300.69 : 163,255.26 = 64,586.15 : x
2. Step 2: Convert to fraction form
   118,300.69/163,255.26 = 64,586.15/x
3. Step 3: Cross multiply
   118,300.69x = 163,255.26 × 64,586.15
4. Step 4: Simplify right side
   118,300.69x = 10,544,028,710.65
5. Step 5: Solve for x
   x = 10,544,028,710.65/118,300.69
6. Step 6: Final answer
   x = 89,129.06