Finding the Fourth Proportional to 151,986.21, 209,751.83 and 84,001.72

Step by Step Solution

1. Step 1: Write the proportion equation
   151,986.21 : 209,751.83 = 84,001.72 : x
2. Step 2: Convert to fraction form
   151,986.21/209,751.83 = 84,001.72/x
3. Step 3: Cross multiply
   151,986.21x = 209,751.83 × 84,001.72
4. Step 4: Simplify right side
   151,986.21x = 17,619,514,650.34
5. Step 5: Solve for x
   x = 17,619,514,650.34/151,986.21
6. Step 6: Final answer
   x = 115,928.38