Finding the Fourth Proportional to 31,406.64, 47,100.59 and 10,342.79

Step by Step Solution

1. Step 1: Write the proportion equation
   31,406.64 : 47,100.59 = 10,342.79 : x
2. Step 2: Convert to fraction form
   31,406.64/47,100.59 = 10,342.79/x
3. Step 3: Cross multiply
   31,406.64x = 47,100.59 × 10,342.79
4. Step 4: Simplify right side
   31,406.64x = 487,151,459.53
5. Step 5: Solve for x
   x = 487,151,459.53/31,406.64
6. Step 6: Final answer
   x = 15,511.10