Finding the Fourth Proportional to 139,312.93, 208,914.88 and 49,320.89

Step by Step Solution

1. Step 1: Write the proportion equation
   139,312.93 : 208,914.88 = 49,320.89 : x
2. Step 2: Convert to fraction form
   139,312.93/208,914.88 = 49,320.89/x
3. Step 3: Cross multiply
   139,312.93x = 208,914.88 × 49,320.89
4. Step 4: Simplify right side
   139,312.93x = 10,303,867,815.84
5. Step 5: Solve for x
   x = 10,303,867,815.84/139,312.93
6. Step 6: Final answer
   x = 73,962.04