Finding the Fourth Proportional to 870,855.94, 1,201,570.86 and 508,072.72

Step by Step Solution

1. Step 1: Write the proportion equation
   870,855.94 : 1,201,570.86 = 508,072.72 : x
2. Step 2: Convert to fraction form
   870,855.94/1,201,570.86 = 508,072.72/x
3. Step 3: Cross multiply
   870,855.94x = 1,201,570.86 × 508,072.72
4. Step 4: Simplify right side
   870,855.94x = 610,485,375,112.94
5. Step 5: Solve for x
   x = 610,485,375,112.94/870,855.94
6. Step 6: Final answer
   x = 701,017.64