Finding the Fourth Proportional to 1,557.58, 2,334.71 and 776.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557.58 : 2,334.71 = 776.04 : x
2. Step 2: Convert to fraction form
   1,557.58/2,334.71 = 776.04/x
3. Step 3: Cross multiply
   1,557.58x = 2,334.71 × 776.04
4. Step 4: Simplify right side
   1,557.58x = 1,811,834.40
5. Step 5: Solve for x
   x = 1,811,834.40/1,557.58
6. Step 6: Final answer
   x = 1,163.23