Finding the Fourth Proportional to 99,019, 136,654.86 and 54,315.64

Step by Step Solution

1. Step 1: Write the proportion equation
   99,019 : 136,654.86 = 54,315.64 : x
2. Step 2: Convert to fraction form
   99,019/136,654.86 = 54,315.64/x
3. Step 3: Cross multiply
   99,019x = 136,654.86 × 54,315.64
4. Step 4: Simplify right side
   99,019x = 7,422,496,180.01
5. Step 5: Solve for x
   x = 7,422,496,180.01/99,019
6. Step 6: Final answer
   x = 74,960.32