Finding the Fourth Proportional to 139,443.56, 209,191.26 and 56,395.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,443.56 : 209,191.26 = 56,395.88 : x
2. Step 2: Convert to fraction form
   139,443.56/209,191.26 = 56,395.88/x
3. Step 3: Cross multiply
   139,443.56x = 209,191.26 × 56,395.88
4. Step 4: Simplify right side
   139,443.56x = 11,797,525,196.01
5. Step 5: Solve for x
   x = 11,797,525,196.01/139,443.56
6. Step 6: Final answer
   x = 84,604.30