Finding the Fourth Proportional to 879,086.10, 1,318,629.15 and 879,086.10

Step by Step Solution

1. Step 1: Write the proportion equation
   879,086.10 : 1,318,629.15 = 879,086.10 : x
2. Step 2: Convert to fraction form
   879,086.10/1,318,629.15 = 879,086.10/x
3. Step 3: Cross multiply
   879,086.10x = 1,318,629.15 × 879,086.10
4. Step 4: Simplify right side
   879,086.10x = 1,159,188,556,819.82
5. Step 5: Solve for x
   x = 1,159,188,556,819.82/879,086.10
6. Step 6: Final answer
   x = 1,318,629.15