Finding the Fourth Proportional to 1,415.83, 1,953.82 and 786.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,415.83 : 1,953.82 = 786.36 : x
2. Step 2: Convert to fraction form
   1,415.83/1,953.82 = 786.36/x
3. Step 3: Cross multiply
   1,415.83x = 1,953.82 × 786.36
4. Step 4: Simplify right side
   1,415.83x = 1,536,405.90
5. Step 5: Solve for x
   x = 1,536,405.90/1,415.83
6. Step 6: Final answer
   x = 1,085.16