Finding the Fourth Proportional to 1,173,251.31, 1,619,086.82 and 636,707.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173,251.31 : 1,619,086.82 = 636,707.31 : x
2. Step 2: Convert to fraction form
   1,173,251.31/1,619,086.82 = 636,707.31/x
3. Step 3: Cross multiply
   1,173,251.31x = 1,619,086.82 × 636,707.31
4. Step 4: Simplify right side
   1,173,251.31x = 1,030,884,413,818.65
5. Step 5: Solve for x
   x = 1,030,884,413,818.65/1,173,251.31
6. Step 6: Final answer
   x = 878,656.09