Finding the Fourth Proportional to 1,690.43, 2,333.63 and 1,061.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.43 : 2,333.63 = 1,061.87 : x
2. Step 2: Convert to fraction form
   1,690.43/2,333.63 = 1,061.87/x
3. Step 3: Cross multiply
   1,690.43x = 2,333.63 × 1,061.87
4. Step 4: Simplify right side
   1,690.43x = 2,477,994.71
5. Step 5: Solve for x
   x = 2,477,994.71/1,690.43
6. Step 6: Final answer
   x = 1,465.90