Finding the Fourth Proportional to 219,060.72, 328,591.62 and 61,290.54

Step by Step Solution

1. Step 1: Write the proportion equation
   219,060.72 : 328,591.62 = 61,290.54 : x
2. Step 2: Convert to fraction form
   219,060.72/328,591.62 = 61,290.54/x
3. Step 3: Cross multiply
   219,060.72x = 328,591.62 × 61,290.54
4. Step 4: Simplify right side
   219,060.72x = 20,139,557,829.27
5. Step 5: Solve for x
   x = 20,139,557,829.27/219,060.72
6. Step 6: Final answer
   x = 91,935.96