Finding the Fourth Proportional to 1,015,628.13, 1,401,546.78 and 556,743.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015,628.13 : 1,401,546.78 = 556,743.69 : x
2. Step 2: Convert to fraction form
   1,015,628.13/1,401,546.78 = 556,743.69/x
3. Step 3: Cross multiply
   1,015,628.13x = 1,401,546.78 × 556,743.69
4. Step 4: Simplify right side
   1,015,628.13x = 780,302,326,004.82
5. Step 5: Solve for x
   x = 780,302,326,004.82/1,015,628.13
6. Step 6: Final answer
   x = 768,295.31