Finding the Fourth Proportional to 42,763.86, 64,156.23 and 30,138.23

Step by Step Solution

1. Step 1: Write the proportion equation
   42,763.86 : 64,156.23 = 30,138.23 : x
2. Step 2: Convert to fraction form
   42,763.86/64,156.23 = 30,138.23/x
3. Step 3: Cross multiply
   42,763.86x = 64,156.23 × 30,138.23
4. Step 4: Simplify right side
   42,763.86x = 1,933,555,215.67
5. Step 5: Solve for x
   x = 1,933,555,215.67/42,763.86
6. Step 6: Final answer
   x = 45,214.70