Finding the Fourth Proportional to 71,768.23, 99,036.47 and 54,784.35

Step by Step Solution

1. Step 1: Write the proportion equation
   71,768.23 : 99,036.47 = 54,784.35 : x
2. Step 2: Convert to fraction form
   71,768.23/99,036.47 = 54,784.35/x
3. Step 3: Cross multiply
   71,768.23x = 99,036.47 × 54,784.35
4. Step 4: Simplify right side
   71,768.23x = 5,425,648,772.21
5. Step 5: Solve for x
   x = 5,425,648,772.21/71,768.23
6. Step 6: Final answer
   x = 75,599.59