Finding the Fourth Proportional to 2,100.62, 3,150.80 and 947.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.62 : 3,150.80 = 947.18 : x
2. Step 2: Convert to fraction form
   2,100.62/3,150.80 = 947.18/x
3. Step 3: Cross multiply
   2,100.62x = 3,150.80 × 947.18
4. Step 4: Simplify right side
   2,100.62x = 2,984,374.74
5. Step 5: Solve for x
   x = 2,984,374.74/2,100.62
6. Step 6: Final answer
   x = 1,420.71