Finding the Fourth Proportional to 1,293,991.92, 1,785,684.72 and 721,019.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,293,991.92 : 1,785,684.72 = 721,019.88 : x
2. Step 2: Convert to fraction form
   1,293,991.92/1,785,684.72 = 721,019.88/x
3. Step 3: Cross multiply
   1,293,991.92x = 1,785,684.72 × 721,019.88
4. Step 4: Simplify right side
   1,293,991.92x = 1,287,514,182,532.23
5. Step 5: Solve for x
   x = 1,287,514,182,532.23/1,293,991.92
6. Step 6: Final answer
   x = 994,993.99