Finding the Fourth Proportional to 1,570.55, 2,167.37 and 981.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.55 : 2,167.37 = 981.43 : x
2. Step 2: Convert to fraction form
   1,570.55/2,167.37 = 981.43/x
3. Step 3: Cross multiply
   1,570.55x = 2,167.37 × 981.43
4. Step 4: Simplify right side
   1,570.55x = 2,127,111.61
5. Step 5: Solve for x
   x = 2,127,111.61/1,570.55
6. Step 6: Final answer
   x = 1,354.38