Finding the Fourth Proportional to 70,648.91, 105,973.95 and 20,729.82

Step by Step Solution

1. Step 1: Write the proportion equation
   70,648.91 : 105,973.95 = 20,729.82 : x
2. Step 2: Convert to fraction form
   70,648.91/105,973.95 = 20,729.82/x
3. Step 3: Cross multiply
   70,648.91x = 105,973.95 × 20,729.82
4. Step 4: Simplify right side
   70,648.91x = 2,196,820,908.19
5. Step 5: Solve for x
   x = 2,196,820,908.19/70,648.91
6. Step 6: Final answer
   x = 31,094.90