Finding the Fourth Proportional to 1,909.90, 2,632.89 and 1,577.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.90 : 2,632.89 = 1,577.74 : x
2. Step 2: Convert to fraction form
   1,909.90/2,632.89 = 1,577.74/x
3. Step 3: Cross multiply
   1,909.90x = 2,632.89 × 1,577.74
4. Step 4: Simplify right side
   1,909.90x = 4,154,015.87
5. Step 5: Solve for x
   x = 4,154,015.87/1,909.90
6. Step 6: Final answer
   x = 2,174.99