Finding the Fourth Proportional to 12,173,921.40, 18,259,499.70 and 3,199,380.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,173,921.40 : 18,259,499.70 = 3,199,380.60 : x
2. Step 2: Convert to fraction form
   12,173,921.40/18,259,499.70 = 3,199,380.60/x
3. Step 3: Cross multiply
   12,173,921.40x = 18,259,499.70 × 3,199,380.60
4. Step 4: Simplify right side
   12,173,921.40x = 58,419,089,105,885.82
5. Step 5: Solve for x
   x = 58,419,089,105,885.82/12,173,921.40
6. Step 6: Final answer
   x = 4,798,707.60