Finding the Fourth Proportional to 1,570.61, 2,355.80 and 881.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.61 : 2,355.80 = 881.59 : x
2. Step 2: Convert to fraction form
   1,570.61/2,355.80 = 881.59/x
3. Step 3: Cross multiply
   1,570.61x = 2,355.80 × 881.59
4. Step 4: Simplify right side
   1,570.61x = 2,076,839.42
5. Step 5: Solve for x
   x = 2,076,839.42/1,570.61
6. Step 6: Final answer
   x = 1,322.32