Finding the Fourth Proportional to 1,570.82, 2,356.72 and 946.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.82 : 2,356.72 = 946.80 : x
2. Step 2: Convert to fraction form
   1,570.82/2,356.72 = 946.80/x
3. Step 3: Cross multiply
   1,570.82x = 2,356.72 × 946.80
4. Step 4: Simplify right side
   1,570.82x = 2,231,342.50
5. Step 5: Solve for x
   x = 2,231,342.50/1,570.82
6. Step 6: Final answer
   x = 1,420.50