Finding the Fourth Proportional to 1,086.41, 1,615.63 and 1,051.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.41 : 1,615.63 = 1,051.80 : x
2. Step 2: Convert to fraction form
   1,086.41/1,615.63 = 1,051.80/x
3. Step 3: Cross multiply
   1,086.41x = 1,615.63 × 1,051.80
4. Step 4: Simplify right side
   1,086.41x = 1,699,327.01
5. Step 5: Solve for x
   x = 1,699,327.01/1,086.41
6. Step 6: Final answer
   x = 1,564.17