Finding the Fourth Proportional to 2,070.64, 3,105.98 and 609.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.64 : 3,105.98 = 609.82 : x
2. Step 2: Convert to fraction form
   2,070.64/3,105.98 = 609.82/x
3. Step 3: Cross multiply
   2,070.64x = 3,105.98 × 609.82
4. Step 4: Simplify right side
   2,070.64x = 1,894,088.72
5. Step 5: Solve for x
   x = 1,894,088.72/2,070.64
6. Step 6: Final answer
   x = 914.74