Finding the Fourth Proportional to 69,978.99, 104,964.17 and 28,424.91

Step by Step Solution

1. Step 1: Write the proportion equation
   69,978.99 : 104,964.17 = 28,424.91 : x
2. Step 2: Convert to fraction form
   69,978.99/104,964.17 = 28,424.91/x
3. Step 3: Cross multiply
   69,978.99x = 104,964.17 × 28,424.91
4. Step 4: Simplify right side
   69,978.99x = 2,983,596,943.35
5. Step 5: Solve for x
   x = 2,983,596,943.35/69,978.99
6. Step 6: Final answer
   x = 42,635.61