Finding the Fourth Proportional to 47,278.42, 65,270.91 and 31,384.60

Step by Step Solution

1. Step 1: Write the proportion equation
   47,278.42 : 65,270.91 = 31,384.60 : x
2. Step 2: Convert to fraction form
   47,278.42/65,270.91 = 31,384.60/x
3. Step 3: Cross multiply
   47,278.42x = 65,270.91 × 31,384.60
4. Step 4: Simplify right side
   47,278.42x = 2,048,501,356.50
5. Step 5: Solve for x
   x = 2,048,501,356.50/47,278.42
6. Step 6: Final answer
   x = 43,328.47