Finding the Fourth Proportional to 42,976.58, 64,150.79 and 39,810.89

Step by Step Solution

1. Step 1: Write the proportion equation
   42,976.58 : 64,150.79 = 39,810.89 : x
2. Step 2: Convert to fraction form
   42,976.58/64,150.79 = 39,810.89/x
3. Step 3: Cross multiply
   42,976.58x = 64,150.79 × 39,810.89
4. Step 4: Simplify right side
   42,976.58x = 2,553,900,005.43
5. Step 5: Solve for x
   x = 2,553,900,005.43/42,976.58
6. Step 6: Final answer
   x = 59,425.40