Finding the Fourth Proportional to 1,008,789.51, 1,392,138.86 and 556,096.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008,789.51 : 1,392,138.86 = 556,096.71 : x
2. Step 2: Convert to fraction form
   1,008,789.51/1,392,138.86 = 556,096.71/x
3. Step 3: Cross multiply
   1,008,789.51x = 1,392,138.86 × 556,096.71
4. Step 4: Simplify right side
   1,008,789.51x = 774,163,837,128.67
5. Step 5: Solve for x
   x = 774,163,837,128.67/1,008,789.51
6. Step 6: Final answer
   x = 767,418.60