Finding the Fourth Proportional to 47,931.48, 72,156.05 and 43,109.12

Step by Step Solution

1. Step 1: Write the proportion equation
   47,931.48 : 72,156.05 = 43,109.12 : x
2. Step 2: Convert to fraction form
   47,931.48/72,156.05 = 43,109.12/x
3. Step 3: Cross multiply
   47,931.48x = 72,156.05 × 43,109.12
4. Step 4: Simplify right side
   47,931.48x = 3,110,583,818.18
5. Step 5: Solve for x
   x = 3,110,583,818.18/47,931.48
6. Step 6: Final answer
   x = 64,896.47