Finding the Fourth Proportional to 978.82, 1,342.50 and 925.87

Step by Step Solution

1. Step 1: Write the proportion equation
   978.82 : 1,342.50 = 925.87 : x
2. Step 2: Convert to fraction form
   978.82/1,342.50 = 925.87/x
3. Step 3: Cross multiply
   978.82x = 1,342.50 × 925.87
4. Step 4: Simplify right side
   978.82x = 1,242,980.59
5. Step 5: Solve for x
   x = 1,242,980.59/978.82
6. Step 6: Final answer
   x = 1,269.87