Finding the Fourth Proportional to 1,557.76, 2,338.56 and 1,477.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557.76 : 2,338.56 = 1,477.12 : x
2. Step 2: Convert to fraction form
   1,557.76/2,338.56 = 1,477.12/x
3. Step 3: Cross multiply
   1,557.76x = 2,338.56 × 1,477.12
4. Step 4: Simplify right side
   1,557.76x = 3,454,333.75
5. Step 5: Solve for x
   x = 3,454,333.75/1,557.76
6. Step 6: Final answer
   x = 2,217.50