Finding the Fourth Proportional to 139,056.93, 208,601.55 and 50,352.21

Step by Step Solution

1. Step 1: Write the proportion equation
   139,056.93 : 208,601.55 = 50,352.21 : x
2. Step 2: Convert to fraction form
   139,056.93/208,601.55 = 50,352.21/x
3. Step 3: Cross multiply
   139,056.93x = 208,601.55 × 50,352.21
4. Step 4: Simplify right side
   139,056.93x = 10,503,549,051.93
5. Step 5: Solve for x
   x = 10,503,549,051.93/139,056.93
6. Step 6: Final answer
   x = 75,534.16