Finding the Fourth Proportional to 72,071.91, 99,404.51 and 62,017.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,071.91 : 99,404.51 = 62,017.20 : x
2. Step 2: Convert to fraction form
   72,071.91/99,404.51 = 62,017.20/x
3. Step 3: Cross multiply
   72,071.91x = 99,404.51 × 62,017.20
4. Step 4: Simplify right side
   72,071.91x = 6,164,789,067.49
5. Step 5: Solve for x
   x = 6,164,789,067.49/72,071.91
6. Step 6: Final answer
   x = 85,536.64