Finding the Fourth Proportional to 1,007.07, 1,516.18 and 788.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.07 : 1,516.18 = 788.86 : x
2. Step 2: Convert to fraction form
   1,007.07/1,516.18 = 788.86/x
3. Step 3: Cross multiply
   1,007.07x = 1,516.18 × 788.86
4. Step 4: Simplify right side
   1,007.07x = 1,196,053.75
5. Step 5: Solve for x
   x = 1,196,053.75/1,007.07
6. Step 6: Final answer
   x = 1,187.66