Finding the Fourth Proportional to 104,771.82, 144,649.71 and 72,121.98

Step by Step Solution

1. Step 1: Write the proportion equation
   104,771.82 : 144,649.71 = 72,121.98 : x
2. Step 2: Convert to fraction form
   104,771.82/144,649.71 = 72,121.98/x
3. Step 3: Cross multiply
   104,771.82x = 144,649.71 × 72,121.98
4. Step 4: Simplify right side
   104,771.82x = 10,432,423,491.63
5. Step 5: Solve for x
   x = 10,432,423,491.63/104,771.82
6. Step 6: Final answer
   x = 99,572.80