Finding the Fourth Proportional to 47,783.20, 65,766.72 and 42,080.66

Step by Step Solution

1. Step 1: Write the proportion equation
   47,783.20 : 65,766.72 = 42,080.66 : x
2. Step 2: Convert to fraction form
   47,783.20/65,766.72 = 42,080.66/x
3. Step 3: Cross multiply
   47,783.20x = 65,766.72 × 42,080.66
4. Step 4: Simplify right side
   47,783.20x = 2,767,506,983.64
5. Step 5: Solve for x
   x = 2,767,506,983.64/47,783.20
6. Step 6: Final answer
   x = 57,917.99