Finding the Fourth Proportional to 1,567.72, 2,162.13 and 977.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,567.72 : 2,162.13 = 977.62 : x
2. Step 2: Convert to fraction form
   1,567.72/2,162.13 = 977.62/x
3. Step 3: Cross multiply
   1,567.72x = 2,162.13 × 977.62
4. Step 4: Simplify right side
   1,567.72x = 2,113,741.53
5. Step 5: Solve for x
   x = 2,113,741.53/1,567.72
6. Step 6: Final answer
   x = 1,348.29