Finding the Fourth Proportional to 70,322.58, 105,461.84 and 20,406.12

Step by Step Solution

1. Step 1: Write the proportion equation
   70,322.58 : 105,461.84 = 20,406.12 : x
2. Step 2: Convert to fraction form
   70,322.58/105,461.84 = 20,406.12/x
3. Step 3: Cross multiply
   70,322.58x = 105,461.84 × 20,406.12
4. Step 4: Simplify right side
   70,322.58x = 2,152,066,962.46
5. Step 5: Solve for x
   x = 2,152,066,962.46/70,322.58
6. Step 6: Final answer
   x = 30,602.79