Finding the Fourth Proportional to 1,572.67, 2,355.67 and 1,278.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,572.67 : 2,355.67 = 1,278.82 : x
2. Step 2: Convert to fraction form
   1,572.67/2,355.67 = 1,278.82/x
3. Step 3: Cross multiply
   1,572.67x = 2,355.67 × 1,278.82
4. Step 4: Simplify right side
   1,572.67x = 3,012,477.91
5. Step 5: Solve for x
   x = 3,012,477.91/1,572.67
6. Step 6: Final answer
   x = 1,915.52