Finding the Fourth Proportional to 12,144,047.40, 18,221,106.78 and 5,317,097.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144,047.40 : 18,221,106.78 = 5,317,097.40 : x
2. Step 2: Convert to fraction form
   12,144,047.40/18,221,106.78 = 5,317,097.40/x
3. Step 3: Cross multiply
   12,144,047.40x = 18,221,106.78 × 5,317,097.40
4. Step 4: Simplify right side
   12,144,047.40x = 96,883,399,485,060.39
5. Step 5: Solve for x
   x = 96,883,399,485,060.39/12,144,047.40
6. Step 6: Final answer
   x = 7,977,850.90