Finding the Fourth Proportional to 148,685.76, 205,196.49 and 84,155.09

Step by Step Solution

1. Step 1: Write the proportion equation
   148,685.76 : 205,196.49 = 84,155.09 : x
2. Step 2: Convert to fraction form
   148,685.76/205,196.49 = 84,155.09/x
3. Step 3: Cross multiply
   148,685.76x = 205,196.49 × 84,155.09
4. Step 4: Simplify right side
   148,685.76x = 17,268,328,057.65
5. Step 5: Solve for x
   x = 17,268,328,057.65/148,685.76
6. Step 6: Final answer
   x = 116,139.76