Finding the Fourth Proportional to 289,856.10, 434,568.15 and 149,715.30

Step by Step Solution

1. Step 1: Write the proportion equation
   289,856.10 : 434,568.15 = 149,715.30 : x
2. Step 2: Convert to fraction form
   289,856.10/434,568.15 = 149,715.30/x
3. Step 3: Cross multiply
   289,856.10x = 434,568.15 × 149,715.30
4. Step 4: Simplify right side
   289,856.10x = 65,061,500,947.70
5. Step 5: Solve for x
   x = 65,061,500,947.70/289,856.10
6. Step 6: Final answer
   x = 224,461.38