Finding the Fourth Proportional to 1,438.37, 2,156.29 and 851.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.37 : 2,156.29 = 851.93 : x
2. Step 2: Convert to fraction form
   1,438.37/2,156.29 = 851.93/x
3. Step 3: Cross multiply
   1,438.37x = 2,156.29 × 851.93
4. Step 4: Simplify right side
   1,438.37x = 1,837,003.31
5. Step 5: Solve for x
   x = 1,837,003.31/1,438.37
6. Step 6: Final answer
   x = 1,277.14