Finding the Fourth Proportional to 38,989.91, 58,444.15 and 28,290.41

Step by Step Solution

1. Step 1: Write the proportion equation
   38,989.91 : 58,444.15 = 28,290.41 : x
2. Step 2: Convert to fraction form
   38,989.91/58,444.15 = 28,290.41/x
3. Step 3: Cross multiply
   38,989.91x = 58,444.15 × 28,290.41
4. Step 4: Simplify right side
   38,989.91x = 1,653,409,111.71
5. Step 5: Solve for x
   x = 1,653,409,111.71/38,989.91
6. Step 6: Final answer
   x = 42,406.08