Finding the Fourth Proportional to 289,019.30, 433,356.15 and 149,051.30

Step by Step Solution

1. Step 1: Write the proportion equation
   289,019.30 : 433,356.15 = 149,051.30 : x
2. Step 2: Convert to fraction form
   289,019.30/433,356.15 = 149,051.30/x
3. Step 3: Cross multiply
   289,019.30x = 433,356.15 × 149,051.30
4. Step 4: Simplify right side
   289,019.30x = 64,592,297,520.50
5. Step 5: Solve for x
   x = 64,592,297,520.50/289,019.30
6. Step 6: Final answer
   x = 223,487.83