Finding the Fourth Proportional to 1,212,408.61, 1,818,655.88 and 301,595.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212,408.61 : 1,818,655.88 = 301,595.83 : x
2. Step 2: Convert to fraction form
   1,212,408.61/1,818,655.88 = 301,595.83/x
3. Step 3: Cross multiply
   1,212,408.61x = 1,818,655.88 × 301,595.83
4. Step 4: Simplify right side
   1,212,408.61x = 548,499,019,011.72
5. Step 5: Solve for x
   x = 548,499,019,011.72/1,212,408.61
6. Step 6: Final answer
   x = 452,404.43