Finding the Fourth Proportional to 2,669.31, 3,994.27 and 1,930.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,669.31 : 3,994.27 = 1,930.40 : x
2. Step 2: Convert to fraction form
   2,669.31/3,994.27 = 1,930.40/x
3. Step 3: Cross multiply
   2,669.31x = 3,994.27 × 1,930.40
4. Step 4: Simplify right side
   2,669.31x = 7,710,538.81
5. Step 5: Solve for x
   x = 7,710,538.81/2,669.31
6. Step 6: Final answer
   x = 2,888.59