Finding the Fourth Proportional to 3,991.12, 5,987.70 and 3,925

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.12 : 5,987.70 = 3,925 : x
2. Step 2: Convert to fraction form
   3,991.12/5,987.70 = 3,925/x
3. Step 3: Cross multiply
   3,991.12x = 5,987.70 × 3,925
4. Step 4: Simplify right side
   3,991.12x = 23,501,722.50
5. Step 5: Solve for x
   x = 23,501,722.50/3,991.12
6. Step 6: Final answer
   x = 5,888.50