Finding the Fourth Proportional to 260,617.82, 359,632.71 and 145,870.18

Step by Step Solution

1. Step 1: Write the proportion equation
   260,617.82 : 359,632.71 = 145,870.18 : x
2. Step 2: Convert to fraction form
   260,617.82/359,632.71 = 145,870.18/x
3. Step 3: Cross multiply
   260,617.82x = 359,632.71 × 145,870.18
4. Step 4: Simplify right side
   260,617.82x = 52,459,688,141.59
5. Step 5: Solve for x
   x = 52,459,688,141.59/260,617.82
6. Step 6: Final answer
   x = 201,289.72