Finding the Fourth Proportional to 279,238.72, 385,337.28 and 155,051.96

Step by Step Solution

1. Step 1: Write the proportion equation
   279,238.72 : 385,337.28 = 155,051.96 : x
2. Step 2: Convert to fraction form
   279,238.72/385,337.28 = 155,051.96/x
3. Step 3: Cross multiply
   279,238.72x = 385,337.28 × 155,051.96
4. Step 4: Simplify right side
   279,238.72x = 59,747,300,525.07
5. Step 5: Solve for x
   x = 59,747,300,525.07/279,238.72
6. Step 6: Final answer
   x = 213,964.96