Finding the Fourth Proportional to 1,570.77, 2,169.06 and 1,153.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.77 : 2,169.06 = 1,153.50 : x
2. Step 2: Convert to fraction form
   1,570.77/2,169.06 = 1,153.50/x
3. Step 3: Cross multiply
   1,570.77x = 2,169.06 × 1,153.50
4. Step 4: Simplify right side
   1,570.77x = 2,502,010.71
5. Step 5: Solve for x
   x = 2,502,010.71/1,570.77
6. Step 6: Final answer
   x = 1,592.86