Finding the Fourth Proportional to 1,054.69, 1,455.94 and 661.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.69 : 1,455.94 = 661.94 : x
2. Step 2: Convert to fraction form
   1,054.69/1,455.94 = 661.94/x
3. Step 3: Cross multiply
   1,054.69x = 1,455.94 × 661.94
4. Step 4: Simplify right side
   1,054.69x = 963,743.93
5. Step 5: Solve for x
   x = 963,743.93/1,054.69
6. Step 6: Final answer
   x = 913.77