Finding the Fourth Proportional to 99,300, 137,151 and 65,707.68

Step by Step Solution

1. Step 1: Write the proportion equation
   99,300 : 137,151 = 65,707.68 : x
2. Step 2: Convert to fraction form
   99,300/137,151 = 65,707.68/x
3. Step 3: Cross multiply
   99,300x = 137,151 × 65,707.68
4. Step 4: Simplify right side
   99,300x = 9,011,874,019.68
5. Step 5: Solve for x
   x = 9,011,874,019.68/99,300
6. Step 6: Final answer
   x = 90,754.02