Finding the Fourth Proportional to 188,499.49, 282,769.85 and 81,810.10

Step by Step Solution

1. Step 1: Write the proportion equation
   188,499.49 : 282,769.85 = 81,810.10 : x
2. Step 2: Convert to fraction form
   188,499.49/282,769.85 = 81,810.10/x
3. Step 3: Cross multiply
   188,499.49x = 282,769.85 × 81,810.10
4. Step 4: Simplify right side
   188,499.49x = 23,133,429,705.49
5. Step 5: Solve for x
   x = 23,133,429,705.49/188,499.49
6. Step 6: Final answer
   x = 122,724.10