Finding the Fourth Proportional to 260,150.78, 359,000.42 and 145,429.68

Step by Step Solution

1. Step 1: Write the proportion equation
   260,150.78 : 359,000.42 = 145,429.68 : x
2. Step 2: Convert to fraction form
   260,150.78/359,000.42 = 145,429.68/x
3. Step 3: Cross multiply
   260,150.78x = 359,000.42 × 145,429.68
4. Step 4: Simplify right side
   260,150.78x = 52,209,316,200.47
5. Step 5: Solve for x
   x = 52,209,316,200.47/260,150.78
6. Step 6: Final answer
   x = 200,688.68