Finding the Fourth Proportional to 1,437.20, 2,168.72 and 1,385.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.20 : 2,168.72 = 1,385.72 : x
2. Step 2: Convert to fraction form
   1,437.20/2,168.72 = 1,385.72/x
3. Step 3: Cross multiply
   1,437.20x = 2,168.72 × 1,385.72
4. Step 4: Simplify right side
   1,437.20x = 3,005,220.91
5. Step 5: Solve for x
   x = 3,005,220.91/1,437.20
6. Step 6: Final answer
   x = 2,091.03