Finding the Fourth Proportional to 71,069.82, 106,641.72 and 28,980.96

Step by Step Solution

1. Step 1: Write the proportion equation
   71,069.82 : 106,641.72 = 28,980.96 : x
2. Step 2: Convert to fraction form
   71,069.82/106,641.72 = 28,980.96/x
3. Step 3: Cross multiply
   71,069.82x = 106,641.72 × 28,980.96
4. Step 4: Simplify right side
   71,069.82x = 3,090,579,421.65
5. Step 5: Solve for x
   x = 3,090,579,421.65/71,069.82
6. Step 6: Final answer
   x = 43,486.52