Finding the Fourth Proportional to 1,312.03, 1,810.61 and 788.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,312.03 : 1,810.61 = 788.37 : x
2. Step 2: Convert to fraction form
   1,312.03/1,810.61 = 788.37/x
3. Step 3: Cross multiply
   1,312.03x = 1,810.61 × 788.37
4. Step 4: Simplify right side
   1,312.03x = 1,427,422.83
5. Step 5: Solve for x
   x = 1,427,422.83/1,312.03
6. Step 6: Final answer
   x = 1,087.95