Finding the Fourth Proportional to 99,405.15, 148,814.78 and 65,608.83

Step by Step Solution

1. Step 1: Write the proportion equation
   99,405.15 : 148,814.78 = 65,608.83 : x
2. Step 2: Convert to fraction form
   99,405.15/148,814.78 = 65,608.83/x
3. Step 3: Cross multiply
   99,405.15x = 148,814.78 × 65,608.83
4. Step 4: Simplify right side
   99,405.15x = 9,763,563,274.46
5. Step 5: Solve for x
   x = 9,763,563,274.46/99,405.15
6. Step 6: Final answer
   x = 98,219.89