Finding the Fourth Proportional to 270,196.18, 405,299.86 and 83,207.50

Step by Step Solution

1. Step 1: Write the proportion equation
   270,196.18 : 405,299.86 = 83,207.50 : x
2. Step 2: Convert to fraction form
   270,196.18/405,299.86 = 83,207.50/x
3. Step 3: Cross multiply
   270,196.18x = 405,299.86 × 83,207.50
4. Step 4: Simplify right side
   270,196.18x = 33,723,988,100.95
5. Step 5: Solve for x
   x = 33,723,988,100.95/270,196.18
6. Step 6: Final answer
   x = 124,812.97