Finding the Fourth Proportional to 139,089.02, 208,578.95 and 49,112.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,089.02 : 208,578.95 = 49,112.55 : x
2. Step 2: Convert to fraction form
   139,089.02/208,578.95 = 49,112.55/x
3. Step 3: Cross multiply
   139,089.02x = 208,578.95 × 49,112.55
4. Step 4: Simplify right side
   139,089.02x = 10,243,843,865.26
5. Step 5: Solve for x
   x = 10,243,843,865.26/139,089.02
6. Step 6: Final answer
   x = 73,649.55