Finding the Fourth Proportional to 1,256.69, 1,881.51 and 947.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.69 : 1,881.51 = 947.57 : x
2. Step 2: Convert to fraction form
   1,256.69/1,881.51 = 947.57/x
3. Step 3: Cross multiply
   1,256.69x = 1,881.51 × 947.57
4. Step 4: Simplify right side
   1,256.69x = 1,782,862.43
5. Step 5: Solve for x
   x = 1,782,862.43/1,256.69
6. Step 6: Final answer
   x = 1,418.70