Finding the Fourth Proportional to 1,347.63, 1,859.67 and 788.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.63 : 1,859.67 = 788.10 : x
2. Step 2: Convert to fraction form
   1,347.63/1,859.67 = 788.10/x
3. Step 3: Cross multiply
   1,347.63x = 1,859.67 × 788.10
4. Step 4: Simplify right side
   1,347.63x = 1,465,605.93
5. Step 5: Solve for x
   x = 1,465,605.93/1,347.63
6. Step 6: Final answer
   x = 1,087.54