Finding the Fourth Proportional to 151,644, 209,268.72 and 84,576

Step by Step Solution

1. Step 1: Write the proportion equation
   151,644 : 209,268.72 = 84,576 : x
2. Step 2: Convert to fraction form
   151,644/209,268.72 = 84,576/x
3. Step 3: Cross multiply
   151,644x = 209,268.72 × 84,576
4. Step 4: Simplify right side
   151,644x = 17,699,111,262.72
5. Step 5: Solve for x
   x = 17,699,111,262.72/151,644
6. Step 6: Final answer
   x = 116,714.88