Finding the Fourth Proportional to 1,570.12, 2,356.59 and 875.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.12 : 2,356.59 = 875.77 : x
2. Step 2: Convert to fraction form
   1,570.12/2,356.59 = 875.77/x
3. Step 3: Cross multiply
   1,570.12x = 2,356.59 × 875.77
4. Step 4: Simplify right side
   1,570.12x = 2,063,830.82
5. Step 5: Solve for x
   x = 2,063,830.82/1,570.12
6. Step 6: Final answer
   x = 1,314.44