Finding the Fourth Proportional to 1,010,606.72, 1,394,628.72 and 557,888

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010,606.72 : 1,394,628.72 = 557,888 : x
2. Step 2: Convert to fraction form
   1,010,606.72/1,394,628.72 = 557,888/x
3. Step 3: Cross multiply
   1,010,606.72x = 1,394,628.72 × 557,888
4. Step 4: Simplify right side
   1,010,606.72x = 778,046,627,343.36
5. Step 5: Solve for x
   x = 778,046,627,343.36/1,010,606.72
6. Step 6: Final answer
   x = 769,880.72