Finding the Fourth Proportional to 78,675.30, 108,572.58 and 42,865.47

Step by Step Solution

1. Step 1: Write the proportion equation
   78,675.30 : 108,572.58 = 42,865.47 : x
2. Step 2: Convert to fraction form
   78,675.30/108,572.58 = 42,865.47/x
3. Step 3: Cross multiply
   78,675.30x = 108,572.58 × 42,865.47
4. Step 4: Simplify right side
   78,675.30x = 4,654,014,670.81
5. Step 5: Solve for x
   x = 4,654,014,670.81/78,675.30
6. Step 6: Final answer
   x = 59,154.71