Finding the Fourth Proportional to 2,100.94, 3,150.31 and 619.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.94 : 3,150.31 = 619.96 : x
2. Step 2: Convert to fraction form
   2,100.94/3,150.31 = 619.96/x
3. Step 3: Cross multiply
   2,100.94x = 3,150.31 × 619.96
4. Step 4: Simplify right side
   2,100.94x = 1,953,063.09
5. Step 5: Solve for x
   x = 1,953,063.09/2,100.94
6. Step 6: Final answer
   x = 929.62