Finding the Fourth Proportional to 279,478.96, 385,689.04 and 152,156.72

Step by Step Solution

1. Step 1: Write the proportion equation
   279,478.96 : 385,689.04 = 152,156.72 : x
2. Step 2: Convert to fraction form
   279,478.96/385,689.04 = 152,156.72/x
3. Step 3: Cross multiply
   279,478.96x = 385,689.04 × 152,156.72
4. Step 4: Simplify right side
   279,478.96x = 58,685,179,266.35
5. Step 5: Solve for x
   x = 58,685,179,266.35/279,478.96
6. Step 6: Final answer
   x = 209,980.67