Finding the Fourth Proportional to 99,803.48, 137,751.90 and 65,818.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,803.48 : 137,751.90 = 65,818.10 : x
2. Step 2: Convert to fraction form
   99,803.48/137,751.90 = 65,818.10/x
3. Step 3: Cross multiply
   99,803.48x = 137,751.90 × 65,818.10
4. Step 4: Simplify right side
   99,803.48x = 9,066,568,329.39
5. Step 5: Solve for x
   x = 9,066,568,329.39/99,803.48
6. Step 6: Final answer
   x = 90,844.21