Finding the Fourth Proportional to 47,060.40, 64,946.76 and 31,117.20

Step by Step Solution

1. Step 1: Write the proportion equation
   47,060.40 : 64,946.76 = 31,117.20 : x
2. Step 2: Convert to fraction form
   47,060.40/64,946.76 = 31,117.20/x
3. Step 3: Cross multiply
   47,060.40x = 64,946.76 × 31,117.20
4. Step 4: Simplify right side
   47,060.40x = 2,020,961,320.27
5. Step 5: Solve for x
   x = 2,020,961,320.27/47,060.40
6. Step 6: Final answer
   x = 42,943.99