Finding the Fourth Proportional to 70,091.06, 105,096.18 and 47,931.28

Step by Step Solution

1. Step 1: Write the proportion equation
   70,091.06 : 105,096.18 = 47,931.28 : x
2. Step 2: Convert to fraction form
   70,091.06/105,096.18 = 47,931.28/x
3. Step 3: Cross multiply
   70,091.06x = 105,096.18 × 47,931.28
4. Step 4: Simplify right side
   70,091.06x = 5,037,394,347.51
5. Step 5: Solve for x
   x = 5,037,394,347.51/70,091.06
6. Step 6: Final answer
   x = 71,869.29