Finding the Fourth Proportional to 126,072.21, 173,980.41 and 72,355.86

Step by Step Solution

1. Step 1: Write the proportion equation
   126,072.21 : 173,980.41 = 72,355.86 : x
2. Step 2: Convert to fraction form
   126,072.21/173,980.41 = 72,355.86/x
3. Step 3: Cross multiply
   126,072.21x = 173,980.41 × 72,355.86
4. Step 4: Simplify right side
   126,072.21x = 12,588,502,188.70
5. Step 5: Solve for x
   x = 12,588,502,188.70/126,072.21
6. Step 6: Final answer
   x = 99,851.52