Finding the Fourth Proportional to 1,415.68, 1,953.44 and 826.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,415.68 : 1,953.44 = 826.08 : x
2. Step 2: Convert to fraction form
   1,415.68/1,953.44 = 826.08/x
3. Step 3: Cross multiply
   1,415.68x = 1,953.44 × 826.08
4. Step 4: Simplify right side
   1,415.68x = 1,613,697.72
5. Step 5: Solve for x
   x = 1,613,697.72/1,415.68
6. Step 6: Final answer
   x = 1,139.87