Finding the Fourth Proportional to 101,364.72, 139,722.28 and 79,820.29

Step by Step Solution

1. Step 1: Write the proportion equation
   101,364.72 : 139,722.28 = 79,820.29 : x
2. Step 2: Convert to fraction form
   101,364.72/139,722.28 = 79,820.29/x
3. Step 3: Cross multiply
   101,364.72x = 139,722.28 × 79,820.29
4. Step 4: Simplify right side
   101,364.72x = 11,152,672,909.06
5. Step 5: Solve for x
   x = 11,152,672,909.06/101,364.72
6. Step 6: Final answer
   x = 110,025.19