Finding the Fourth Proportional to 289,870.10, 434,589.15 and 149,729.30

Step by Step Solution

1. Step 1: Write the proportion equation
   289,870.10 : 434,589.15 = 149,729.30 : x
2. Step 2: Convert to fraction form
   289,870.10/434,589.15 = 149,729.30/x
3. Step 3: Cross multiply
   289,870.10x = 434,589.15 × 149,729.30
4. Step 4: Simplify right side
   289,870.10x = 65,070,729,217.10
5. Step 5: Solve for x
   x = 65,070,729,217.10/289,870.10
6. Step 6: Final answer
   x = 224,482.38