Finding the Fourth Proportional to 11,985.60, 17,970.86 and 3,662.84

Step by Step Solution

1. Step 1: Write the proportion equation
   11,985.60 : 17,970.86 = 3,662.84 : x
2. Step 2: Convert to fraction form
   11,985.60/17,970.86 = 3,662.84/x
3. Step 3: Cross multiply
   11,985.60x = 17,970.86 × 3,662.84
4. Step 4: Simplify right side
   11,985.60x = 65,824,384.84
5. Step 5: Solve for x
   x = 65,824,384.84/11,985.60
6. Step 6: Final answer
   x = 5,491.96