Finding the Fourth Proportional to 4,991.31, 7,488.70 and 1,706.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,991.31 : 7,488.70 = 1,706.72 : x
2. Step 2: Convert to fraction form
   4,991.31/7,488.70 = 1,706.72/x
3. Step 3: Cross multiply
   4,991.31x = 7,488.70 × 1,706.72
4. Step 4: Simplify right side
   4,991.31x = 12,781,086.81
5. Step 5: Solve for x
   x = 12,781,086.81/4,991.31
6. Step 6: Final answer
   x = 2,560.67