Finding the Fourth Proportional to 1,007,869.56, 1,390,860.06 and 555,160.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007,869.56 : 1,390,860.06 = 555,160.56 : x
2. Step 2: Convert to fraction form
   1,007,869.56/1,390,860.06 = 555,160.56/x
3. Step 3: Cross multiply
   1,007,869.56x = 1,390,860.06 × 555,160.56
4. Step 4: Simplify right side
   1,007,869.56x = 772,150,649,791.23
5. Step 5: Solve for x
   x = 772,150,649,791.23/1,007,869.56
6. Step 6: Final answer
   x = 766,121.61