Finding the Fourth Proportional to 279,145.57, 385,222.71 and 151,822.09

Step by Step Solution

1. Step 1: Write the proportion equation
   279,145.57 : 385,222.71 = 151,822.09 : x
2. Step 2: Convert to fraction form
   279,145.57/385,222.71 = 151,822.09/x
3. Step 3: Cross multiply
   279,145.57x = 385,222.71 × 151,822.09
4. Step 4: Simplify right side
   279,145.57x = 58,485,316,947.66
5. Step 5: Solve for x
   x = 58,485,316,947.66/279,145.57
6. Step 6: Final answer
   x = 209,515.48