Finding the Fourth Proportional to 78,557.23, 108,409 and 42,747.38

Step by Step Solution

1. Step 1: Write the proportion equation
   78,557.23 : 108,409 = 42,747.38 : x
2. Step 2: Convert to fraction form
   78,557.23/108,409 = 42,747.38/x
3. Step 3: Cross multiply
   78,557.23x = 108,409 × 42,747.38
4. Step 4: Simplify right side
   78,557.23x = 4,634,200,718.42
5. Step 5: Solve for x
   x = 4,634,200,718.42/78,557.23
6. Step 6: Final answer
   x = 58,991.40