Finding the Fourth Proportional to 1,379.61, 1,906.59 and 1,130.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.61 : 1,906.59 = 1,130.54 : x
2. Step 2: Convert to fraction form
   1,379.61/1,906.59 = 1,130.54/x
3. Step 3: Cross multiply
   1,379.61x = 1,906.59 × 1,130.54
4. Step 4: Simplify right side
   1,379.61x = 2,155,466.73
5. Step 5: Solve for x
   x = 2,155,466.73/1,379.61
6. Step 6: Final answer
   x = 1,562.37