Finding the Fourth Proportional to 99,805.34, 137,754.53 and 65,819.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,805.34 : 137,754.53 = 65,819.96 : x
2. Step 2: Convert to fraction form
   99,805.34/137,754.53 = 65,819.96/x
3. Step 3: Cross multiply
   99,805.34x = 137,754.53 × 65,819.96
4. Step 4: Simplify right side
   99,805.34x = 9,066,997,325.32
5. Step 5: Solve for x
   x = 9,066,997,325.32/99,805.34
6. Step 6: Final answer
   x = 90,846.82