Finding the Fourth Proportional to 1,008,059.50, 1,512,118.42 and 260,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008,059.50 : 1,512,118.42 = 260,105.50 : x
2. Step 2: Convert to fraction form
   1,008,059.50/1,512,118.42 = 260,105.50/x
3. Step 3: Cross multiply
   1,008,059.50x = 1,512,118.42 × 260,105.50
4. Step 4: Simplify right side
   1,008,059.50x = 393,310,317,693.31
5. Step 5: Solve for x
   x = 393,310,317,693.31/1,008,059.50
6. Step 6: Final answer
   x = 390,165.78