Finding the Fourth Proportional to 1,378.01, 1,901.54 and 788.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378.01 : 1,901.54 = 788.42 : x
2. Step 2: Convert to fraction form
   1,378.01/1,901.54 = 788.42/x
3. Step 3: Cross multiply
   1,378.01x = 1,901.54 × 788.42
4. Step 4: Simplify right side
   1,378.01x = 1,499,208.22
5. Step 5: Solve for x
   x = 1,499,208.22/1,378.01
6. Step 6: Final answer
   x = 1,087.95