Finding the Fourth Proportional to 104,643.89, 144,404.59 and 56,897.28

Step by Step Solution

1. Step 1: Write the proportion equation
   104,643.89 : 144,404.59 = 56,897.28 : x
2. Step 2: Convert to fraction form
   104,643.89/144,404.59 = 56,897.28/x
3. Step 3: Cross multiply
   104,643.89x = 144,404.59 × 56,897.28
4. Step 4: Simplify right side
   104,643.89x = 8,216,227,384.01
5. Step 5: Solve for x
   x = 8,216,227,384.01/104,643.89
6. Step 6: Final answer
   x = 78,516.07