Finding the Fourth Proportional to 101,971.35, 140,704.83 and 56,648.61

Step by Step Solution

1. Step 1: Write the proportion equation
   101,971.35 : 140,704.83 = 56,648.61 : x
2. Step 2: Convert to fraction form
   101,971.35/140,704.83 = 56,648.61/x
3. Step 3: Cross multiply
   101,971.35x = 140,704.83 × 56,648.61
4. Step 4: Simplify right side
   101,971.35x = 7,970,733,039.79
5. Step 5: Solve for x
   x = 7,970,733,039.79/101,971.35
6. Step 6: Final answer
   x = 78,166.40