Finding the Fourth Proportional to 103,904.28, 143,388.59 and 56,157.57

Step by Step Solution

1. Step 1: Write the proportion equation
   103,904.28 : 143,388.59 = 56,157.57 : x
2. Step 2: Convert to fraction form
   103,904.28/143,388.59 = 56,157.57/x
3. Step 3: Cross multiply
   103,904.28x = 143,388.59 × 56,157.57
4. Step 4: Simplify right side
   103,904.28x = 8,052,354,499.34
5. Step 5: Solve for x
   x = 8,052,354,499.34/103,904.28
6. Step 6: Final answer
   x = 77,497.81