Finding the Fourth Proportional to 1,415.66, 1,953.59 and 786.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,415.66 : 1,953.59 = 786.16 : x
2. Step 2: Convert to fraction form
   1,415.66/1,953.59 = 786.16/x
3. Step 3: Cross multiply
   1,415.66x = 1,953.59 × 786.16
4. Step 4: Simplify right side
   1,415.66x = 1,535,834.31
5. Step 5: Solve for x
   x = 1,535,834.31/1,415.66
6. Step 6: Final answer
   x = 1,084.89