Finding the Fourth Proportional to 151,566.72, 209,137.92 and 84,499.20

Step by Step Solution

1. Step 1: Write the proportion equation
   151,566.72 : 209,137.92 = 84,499.20 : x
2. Step 2: Convert to fraction form
   151,566.72/209,137.92 = 84,499.20/x
3. Step 3: Cross multiply
   151,566.72x = 209,137.92 × 84,499.20
4. Step 4: Simplify right side
   151,566.72x = 17,671,986,929.66
5. Step 5: Solve for x
   x = 17,671,986,929.66/151,566.72
6. Step 6: Final answer
   x = 116,595.43