Finding the Fourth Proportional to 1,427.69, 1,970.45 and 924.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.69 : 1,970.45 = 924.15 : x
2. Step 2: Convert to fraction form
   1,427.69/1,970.45 = 924.15/x
3. Step 3: Cross multiply
   1,427.69x = 1,970.45 × 924.15
4. Step 4: Simplify right side
   1,427.69x = 1,820,986.75
5. Step 5: Solve for x
   x = 1,820,986.75/1,427.69
6. Step 6: Final answer
   x = 1,275.48