Finding the Fourth Proportional to 1,128,978.36, 1,558,719.72 and 699,714

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128,978.36 : 1,558,719.72 = 699,714 : x
2. Step 2: Convert to fraction form
   1,128,978.36/1,558,719.72 = 699,714/x
3. Step 3: Cross multiply
   1,128,978.36x = 1,558,719.72 × 699,714
4. Step 4: Simplify right side
   1,128,978.36x = 1,090,658,010,160.08
5. Step 5: Solve for x
   x = 1,090,658,010,160.08/1,128,978.36
6. Step 6: Final answer
   x = 966,057.50