Finding the Fourth Proportional to 1,395.98, 1,926.13 and 947.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.98 : 1,926.13 = 947.91 : x
2. Step 2: Convert to fraction form
   1,395.98/1,926.13 = 947.91/x
3. Step 3: Cross multiply
   1,395.98x = 1,926.13 × 947.91
4. Step 4: Simplify right side
   1,395.98x = 1,825,793.15
5. Step 5: Solve for x
   x = 1,825,793.15/1,395.98
6. Step 6: Final answer
   x = 1,307.90