Finding the Fourth Proportional to 151,758, 209,426.16 and 84,690

Step by Step Solution

1. Step 1: Write the proportion equation
   151,758 : 209,426.16 = 84,690 : x
2. Step 2: Convert to fraction form
   151,758/209,426.16 = 84,690/x
3. Step 3: Cross multiply
   151,758x = 209,426.16 × 84,690
4. Step 4: Simplify right side
   151,758x = 17,736,301,490.40
5. Step 5: Solve for x
   x = 17,736,301,490.40/151,758
6. Step 6: Final answer
   x = 116,872.27