Finding the Fourth Proportional to 156,718.69, 216,271.80 and 89,650.69

Step by Step Solution

1. Step 1: Write the proportion equation
   156,718.69 : 216,271.80 = 89,650.69 : x
2. Step 2: Convert to fraction form
   156,718.69/216,271.80 = 89,650.69/x
3. Step 3: Cross multiply
   156,718.69x = 216,271.80 × 89,650.69
4. Step 4: Simplify right side
   156,718.69x = 19,388,915,556.86
5. Step 5: Solve for x
   x = 19,388,915,556.86/156,718.69
6. Step 6: Final answer
   x = 123,717.96