Finding the Fourth Proportional to 1,076.76, 1,485.54 and 972

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.76 : 1,485.54 = 972 : x
2. Step 2: Convert to fraction form
   1,076.76/1,485.54 = 972/x
3. Step 3: Cross multiply
   1,076.76x = 1,485.54 × 972
4. Step 4: Simplify right side
   1,076.76x = 1,443,944.88
5. Step 5: Solve for x
   x = 1,443,944.88/1,076.76
6. Step 6: Final answer
   x = 1,341.01