Finding the Fourth Proportional to 2,137.61, 2,945.52 and 1,577.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,137.61 : 2,945.52 = 1,577.21 : x
2. Step 2: Convert to fraction form
   2,137.61/2,945.52 = 1,577.21/x
3. Step 3: Cross multiply
   2,137.61x = 2,945.52 × 1,577.21
4. Step 4: Simplify right side
   2,137.61x = 4,645,688.87
5. Step 5: Solve for x
   x = 4,645,688.87/2,137.61
6. Step 6: Final answer
   x = 2,173.31