Finding the Fourth Proportional to 70,437.42, 105,674.52 and 20,516.42

Step by Step Solution

1. Step 1: Write the proportion equation
   70,437.42 : 105,674.52 = 20,516.42 : x
2. Step 2: Convert to fraction form
   70,437.42/105,674.52 = 20,516.42/x
3. Step 3: Cross multiply
   70,437.42x = 105,674.52 × 20,516.42
4. Step 4: Simplify right side
   70,437.42x = 2,168,062,835.62
5. Step 5: Solve for x
   x = 2,168,062,835.62/70,437.42
6. Step 6: Final answer
   x = 30,779.99