Finding the Fourth Proportional to 99,105.72, 136,770.06 and 56,664.24

Step by Step Solution

1. Step 1: Write the proportion equation
   99,105.72 : 136,770.06 = 56,664.24 : x
2. Step 2: Convert to fraction form
   99,105.72/136,770.06 = 56,664.24/x
3. Step 3: Cross multiply
   99,105.72x = 136,770.06 × 56,664.24
4. Step 4: Simplify right side
   99,105.72x = 7,749,971,504.65
5. Step 5: Solve for x
   x = 7,749,971,504.65/99,105.72
6. Step 6: Final answer
   x = 78,199.03