Finding the Fourth Proportional to 101,738.79, 140,396.94 and 56,416.05

Step by Step Solution

1. Step 1: Write the proportion equation
   101,738.79 : 140,396.94 = 56,416.05 : x
2. Step 2: Convert to fraction form
   101,738.79/140,396.94 = 56,416.05/x
3. Step 3: Cross multiply
   101,738.79x = 140,396.94 × 56,416.05
4. Step 4: Simplify right side
   101,738.79x = 7,920,640,786.89
5. Step 5: Solve for x
   x = 7,920,640,786.89/101,738.79
6. Step 6: Final answer
   x = 77,852.71