Finding the Fourth Proportional to 151,789, 209,470.98 and 84,721

Step by Step Solution

1. Step 1: Write the proportion equation
   151,789 : 209,470.98 = 84,721 : x
2. Step 2: Convert to fraction form
   151,789/209,470.98 = 84,721/x
3. Step 3: Cross multiply
   151,789x = 209,470.98 × 84,721
4. Step 4: Simplify right side
   151,789x = 17,746,590,896.58
5. Step 5: Solve for x
   x = 17,746,590,896.58/151,789
6. Step 6: Final answer
   x = 116,916.19