Finding the Fourth Proportional to 1,137,789.51, 1,570,144.71 and 628,491.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,137,789.51 : 1,570,144.71 = 628,491.88 : x
2. Step 2: Convert to fraction form
   1,137,789.51/1,570,144.71 = 628,491.88/x
3. Step 3: Cross multiply
   1,137,789.51x = 1,570,144.71 × 628,491.88
4. Step 4: Simplify right side
   1,137,789.51x = 986,823,200,659.96
5. Step 5: Solve for x
   x = 986,823,200,659.96/1,137,789.51
6. Step 6: Final answer
   x = 867,316.14