Finding the Fourth Proportional to 376,189.20, 519,141.15 and 215,047.80

Step by Step Solution

1. Step 1: Write the proportion equation
   376,189.20 : 519,141.15 = 215,047.80 : x
2. Step 2: Convert to fraction form
   376,189.20/519,141.15 = 215,047.80/x
3. Step 3: Cross multiply
   376,189.20x = 519,141.15 × 215,047.80
4. Step 4: Simplify right side
   376,189.20x = 111,640,162,196.97
5. Step 5: Solve for x
   x = 111,640,162,196.97/376,189.20
6. Step 6: Final answer
   x = 296,765.99