Finding the Fourth Proportional to 104,554.40, 144,281.86 and 56,806.72

Step by Step Solution

1. Step 1: Write the proportion equation
   104,554.40 : 144,281.86 = 56,806.72 : x
2. Step 2: Convert to fraction form
   104,554.40/144,281.86 = 56,806.72/x
3. Step 3: Cross multiply
   104,554.40x = 144,281.86 × 56,806.72
4. Step 4: Simplify right side
   104,554.40x = 8,196,178,719.38
5. Step 5: Solve for x
   x = 8,196,178,719.38/104,554.40
6. Step 6: Final answer
   x = 78,391.53