Finding the Fourth Proportional to 1,570.76, 2,167.71 and 907.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.76 : 2,167.71 = 907.67 : x
2. Step 2: Convert to fraction form
   1,570.76/2,167.71 = 907.67/x
3. Step 3: Cross multiply
   1,570.76x = 2,167.71 × 907.67
4. Step 4: Simplify right side
   1,570.76x = 1,967,565.34
5. Step 5: Solve for x
   x = 1,967,565.34/1,570.76
6. Step 6: Final answer
   x = 1,252.62