Finding the Fourth Proportional to 1,422.51, 1,961.86 and 924.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.51 : 1,961.86 = 924.77 : x
2. Step 2: Convert to fraction form
   1,422.51/1,961.86 = 924.77/x
3. Step 3: Cross multiply
   1,422.51x = 1,961.86 × 924.77
4. Step 4: Simplify right side
   1,422.51x = 1,814,269.27
5. Step 5: Solve for x
   x = 1,814,269.27/1,422.51
6. Step 6: Final answer
   x = 1,275.40