Finding the Fourth Proportional to 103,945.86, 143,445.24 and 56,199.20

Step by Step Solution

1. Step 1: Write the proportion equation
   103,945.86 : 143,445.24 = 56,199.20 : x
2. Step 2: Convert to fraction form
   103,945.86/143,445.24 = 56,199.20/x
3. Step 3: Cross multiply
   103,945.86x = 143,445.24 × 56,199.20
4. Step 4: Simplify right side
   103,945.86x = 8,061,507,014.58
5. Step 5: Solve for x
   x = 8,061,507,014.58/103,945.86
6. Step 6: Final answer
   x = 77,554.86