Finding the Fourth Proportional to 38,460.91, 53,078.72 and 21,468.47

Step by Step Solution

1. Step 1: Write the proportion equation
   38,460.91 : 53,078.72 = 21,468.47 : x
2. Step 2: Convert to fraction form
   38,460.91/53,078.72 = 21,468.47/x
3. Step 3: Cross multiply
   38,460.91x = 53,078.72 × 21,468.47
4. Step 4: Simplify right side
   38,460.91x = 1,139,518,642.56
5. Step 5: Solve for x
   x = 1,139,518,642.56/38,460.91
6. Step 6: Final answer
   x = 29,627.97