Finding the Fourth Proportional to 1,978.09, 2,971.22 and 1,570.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.09 : 2,971.22 = 1,570.09 : x
2. Step 2: Convert to fraction form
   1,978.09/2,971.22 = 1,570.09/x
3. Step 3: Cross multiply
   1,978.09x = 2,971.22 × 1,570.09
4. Step 4: Simplify right side
   1,978.09x = 4,665,082.81
5. Step 5: Solve for x
   x = 4,665,082.81/1,978.09
6. Step 6: Final answer
   x = 2,358.38