Finding the Fourth Proportional to 1,570.34, 2,168.00 and 981.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.34 : 2,168.00 = 981.67 : x
2. Step 2: Convert to fraction form
   1,570.34/2,168.00 = 981.67/x
3. Step 3: Cross multiply
   1,570.34x = 2,168.00 × 981.67
4. Step 4: Simplify right side
   1,570.34x = 2,128,257.59
5. Step 5: Solve for x
   x = 2,128,257.59/1,570.34
6. Step 6: Final answer
   x = 1,355.29