Finding the Fourth Proportional to 1,018.94, 1,531.40 and 846.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.94 : 1,531.40 = 846.72 : x
2. Step 2: Convert to fraction form
   1,018.94/1,531.40 = 846.72/x
3. Step 3: Cross multiply
   1,018.94x = 1,531.40 × 846.72
4. Step 4: Simplify right side
   1,018.94x = 1,296,667.01
5. Step 5: Solve for x
   x = 1,296,667.01/1,018.94
6. Step 6: Final answer
   x = 1,272.56