Finding the Fourth Proportional to 279,144.78, 385,208.73 and 151,820.34

Step by Step Solution

1. Step 1: Write the proportion equation
   279,144.78 : 385,208.73 = 151,820.34 : x
2. Step 2: Convert to fraction form
   279,144.78/385,208.73 = 151,820.34/x
3. Step 3: Cross multiply
   279,144.78x = 385,208.73 × 151,820.34
4. Step 4: Simplify right side
   279,144.78x = 58,482,520,359.57
5. Step 5: Solve for x
   x = 58,482,520,359.57/279,144.78
6. Step 6: Final answer
   x = 209,506.05