Finding the Fourth Proportional to 1,554.85, 2,331.91 and 938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.85 : 2,331.91 = 938.72 : x
2. Step 2: Convert to fraction form
   1,554.85/2,331.91 = 938.72/x
3. Step 3: Cross multiply
   1,554.85x = 2,331.91 × 938.72
4. Step 4: Simplify right side
   1,554.85x = 2,189,017.56
5. Step 5: Solve for x
   x = 2,189,017.56/1,554.85
6. Step 6: Final answer
   x = 1,407.86