Finding the Fourth Proportional to 1,570.67, 2,168.00 and 907.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.67 : 2,168.00 = 907.99 : x
2. Step 2: Convert to fraction form
   1,570.67/2,168.00 = 907.99/x
3. Step 3: Cross multiply
   1,570.67x = 2,168.00 × 907.99
4. Step 4: Simplify right side
   1,570.67x = 1,968,506.94
5. Step 5: Solve for x
   x = 1,968,506.94/1,570.67
6. Step 6: Final answer
   x = 1,253.30