Finding the Fourth Proportional to 1,570.42, 2,167.05 and 907.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.42 : 2,167.05 = 907.30 : x
2. Step 2: Convert to fraction form
   1,570.42/2,167.05 = 907.30/x
3. Step 3: Cross multiply
   1,570.42x = 2,167.05 × 907.30
4. Step 4: Simplify right side
   1,570.42x = 1,966,164.47
5. Step 5: Solve for x
   x = 1,966,164.47/1,570.42
6. Step 6: Final answer
   x = 1,252.00