Finding the Fourth Proportional to 9,978.55, 14,959.70 and 3,735.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.55 : 14,959.70 = 3,735.06 : x
2. Step 2: Convert to fraction form
   9,978.55/14,959.70 = 3,735.06/x
3. Step 3: Cross multiply
   9,978.55x = 14,959.70 × 3,735.06
4. Step 4: Simplify right side
   9,978.55x = 55,875,421.47
5. Step 5: Solve for x
   x = 55,875,421.47/9,978.55
6. Step 6: Final answer
   x = 5,599.55