Finding the Fourth Proportional to 42,847.98, 64,271.94 and 19,458

Step by Step Solution

1. Step 1: Write the proportion equation
   42,847.98 : 64,271.94 = 19,458 : x
2. Step 2: Convert to fraction form
   42,847.98/64,271.94 = 19,458/x
3. Step 3: Cross multiply
   42,847.98x = 64,271.94 × 19,458
4. Step 4: Simplify right side
   42,847.98x = 1,250,603,408.52
5. Step 5: Solve for x
   x = 1,250,603,408.52/42,847.98
6. Step 6: Final answer
   x = 29,186.99