Finding the Fourth Proportional to 1,200.69, 1,656.32 and 976.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.69 : 1,656.32 = 976.87 : x
2. Step 2: Convert to fraction form
   1,200.69/1,656.32 = 976.87/x
3. Step 3: Cross multiply
   1,200.69x = 1,656.32 × 976.87
4. Step 4: Simplify right side
   1,200.69x = 1,618,017.76
5. Step 5: Solve for x
   x = 1,618,017.76/1,200.69
6. Step 6: Final answer
   x = 1,347.57