Finding the Fourth Proportional to 42,930.74, 64,080.27 and 39,922.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,930.74 : 64,080.27 = 39,922.40 : x
2. Step 2: Convert to fraction form
   42,930.74/64,080.27 = 39,922.40/x
3. Step 3: Cross multiply
   42,930.74x = 64,080.27 × 39,922.40
4. Step 4: Simplify right side
   42,930.74x = 2,558,238,171.05
5. Step 5: Solve for x
   x = 2,558,238,171.05/42,930.74
6. Step 6: Final answer
   x = 59,589.89