Finding the Fourth Proportional to 1,577.72, 2,168.10 and 1,505.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,577.72 : 2,168.10 = 1,505.46 : x
2. Step 2: Convert to fraction form
   1,577.72/2,168.10 = 1,505.46/x
3. Step 3: Cross multiply
   1,577.72x = 2,168.10 × 1,505.46
4. Step 4: Simplify right side
   1,577.72x = 3,263,987.83
5. Step 5: Solve for x
   x = 3,263,987.83/1,577.72
6. Step 6: Final answer
   x = 2,068.80