Finding the Fourth Proportional to 1,038.89, 1,554.06 and 947.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.89 : 1,554.06 = 947.65 : x
2. Step 2: Convert to fraction form
   1,038.89/1,554.06 = 947.65/x
3. Step 3: Cross multiply
   1,038.89x = 1,554.06 × 947.65
4. Step 4: Simplify right side
   1,038.89x = 1,472,704.88
5. Step 5: Solve for x
   x = 1,472,704.88/1,038.89
6. Step 6: Final answer
   x = 1,417.58