Finding the Fourth Proportional to 2,071.86, 3,106.72 and 610.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.86 : 3,106.72 = 610.83 : x
2. Step 2: Convert to fraction form
   2,071.86/3,106.72 = 610.83/x
3. Step 3: Cross multiply
   2,071.86x = 3,106.72 × 610.83
4. Step 4: Simplify right side
   2,071.86x = 1,897,677.78
5. Step 5: Solve for x
   x = 1,897,677.78/2,071.86
6. Step 6: Final answer
   x = 915.93