Finding the Fourth Proportional to 12,985,919.12, 17,921,095.89 and 7,184,606.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,985,919.12 : 17,921,095.89 = 7,184,606.38 : x
2. Step 2: Convert to fraction form
   12,985,919.12/17,921,095.89 = 7,184,606.38/x
3. Step 3: Cross multiply
   12,985,919.12x = 17,921,095.89 × 7,184,606.38
4. Step 4: Simplify right side
   12,985,919.12x = 128,756,019,867,885.78
5. Step 5: Solve for x
   x = 128,756,019,867,885.78/12,985,919.12
6. Step 6: Final answer
   x = 9,915,048.65