Finding the Fourth Proportional to 99,019, 136,653.42 and 56,576.62

Step by Step Solution

1. Step 1: Write the proportion equation
   99,019 : 136,653.42 = 56,576.62 : x
2. Step 2: Convert to fraction form
   99,019/136,653.42 = 56,576.62/x
3. Step 3: Cross multiply
   99,019x = 136,653.42 × 56,576.62
4. Step 4: Simplify right side
   99,019x = 7,731,388,615.04
5. Step 5: Solve for x
   x = 7,731,388,615.04/99,019
6. Step 6: Final answer
   x = 78,079.85