Finding the Fourth Proportional to 1,953.47, 2,929.15 and 856.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,953.47 : 2,929.15 = 856.56 : x
2. Step 2: Convert to fraction form
   1,953.47/2,929.15 = 856.56/x
3. Step 3: Cross multiply
   1,953.47x = 2,929.15 × 856.56
4. Step 4: Simplify right side
   1,953.47x = 2,508,992.72
5. Step 5: Solve for x
   x = 2,508,992.72/1,953.47
6. Step 6: Final answer
   x = 1,284.38