Finding the Fourth Proportional to 103,947.42, 143,447.31 and 56,200.65

Step by Step Solution

1. Step 1: Write the proportion equation
   103,947.42 : 143,447.31 = 56,200.65 : x
2. Step 2: Convert to fraction form
   103,947.42/143,447.31 = 56,200.65/x
3. Step 3: Cross multiply
   103,947.42x = 143,447.31 × 56,200.65
4. Step 4: Simplify right side
   103,947.42x = 8,061,831,953.69
5. Step 5: Solve for x
   x = 8,061,831,953.69/103,947.42
6. Step 6: Final answer
   x = 77,556.83