Finding the Fourth Proportional to 289,667.76, 399,719.52 and 162,318.72

Step by Step Solution

1. Step 1: Write the proportion equation
   289,667.76 : 399,719.52 = 162,318.72 : x
2. Step 2: Convert to fraction form
   289,667.76/399,719.52 = 162,318.72/x
3. Step 3: Cross multiply
   289,667.76x = 399,719.52 × 162,318.72
4. Step 4: Simplify right side
   289,667.76x = 64,881,960,845.41
5. Step 5: Solve for x
   x = 64,881,960,845.41/289,667.76
6. Step 6: Final answer
   x = 223,987.51