Finding the Fourth Proportional to 42,491.58, 63,758.79 and 30,091.29

Step by Step Solution

1. Step 1: Write the proportion equation
   42,491.58 : 63,758.79 = 30,091.29 : x
2. Step 2: Convert to fraction form
   42,491.58/63,758.79 = 30,091.29/x
3. Step 3: Cross multiply
   42,491.58x = 63,758.79 × 30,091.29
4. Step 4: Simplify right side
   42,491.58x = 1,918,584,239.94
5. Step 5: Solve for x
   x = 1,918,584,239.94/42,491.58
6. Step 6: Final answer
   x = 45,152.10