Finding the Fourth Proportional to 72,120.42, 99,506.46 and 49,465.02

Step by Step Solution

1. Step 1: Write the proportion equation
   72,120.42 : 99,506.46 = 49,465.02 : x
2. Step 2: Convert to fraction form
   72,120.42/99,506.46 = 49,465.02/x
3. Step 3: Cross multiply
   72,120.42x = 99,506.46 × 49,465.02
4. Step 4: Simplify right side
   72,120.42x = 4,922,089,034.03
5. Step 5: Solve for x
   x = 4,922,089,034.03/72,120.42
6. Step 6: Final answer
   x = 68,248.20