Finding the Fourth Proportional to 1,366.98, 1,886.61 and 947.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.98 : 1,886.61 = 947.22 : x
2. Step 2: Convert to fraction form
   1,366.98/1,886.61 = 947.22/x
3. Step 3: Cross multiply
   1,366.98x = 1,886.61 × 947.22
4. Step 4: Simplify right side
   1,366.98x = 1,787,034.72
5. Step 5: Solve for x
   x = 1,787,034.72/1,366.98
6. Step 6: Final answer
   x = 1,307.29