Finding the Fourth Proportional to 42,710.70, 64,029.59 and 30,191.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42,710.70 : 64,029.59 = 30,191.34 : x
2. Step 2: Convert to fraction form
   42,710.70/64,029.59 = 30,191.34/x
3. Step 3: Cross multiply
   42,710.70x = 64,029.59 × 30,191.34
4. Step 4: Simplify right side
   42,710.70x = 1,933,139,121.75
5. Step 5: Solve for x
   x = 1,933,139,121.75/42,710.70
6. Step 6: Final answer
   x = 45,261.24