Finding the Fourth Proportional to 73,809.10, 101,905.59 and 56,783.31

Step by Step Solution

1. Step 1: Write the proportion equation
   73,809.10 : 101,905.59 = 56,783.31 : x
2. Step 2: Convert to fraction form
   73,809.10/101,905.59 = 56,783.31/x
3. Step 3: Cross multiply
   73,809.10x = 101,905.59 × 56,783.31
4. Step 4: Simplify right side
   73,809.10x = 5,786,536,538.49
5. Step 5: Solve for x
   x = 5,786,536,538.49/73,809.10
6. Step 6: Final answer
   x = 78,398.69