Finding the Fourth Proportional to 49,075.48, 73,613.04 and 12,139.48

Step by Step Solution

1. Step 1: Write the proportion equation
   49,075.48 : 73,613.04 = 12,139.48 : x
2. Step 2: Convert to fraction form
   49,075.48/73,613.04 = 12,139.48/x
3. Step 3: Cross multiply
   49,075.48x = 73,613.04 × 12,139.48
4. Step 4: Simplify right side
   49,075.48x = 893,624,026.82
5. Step 5: Solve for x
   x = 893,624,026.82/49,075.48
6. Step 6: Final answer
   x = 18,209.18