Finding the Fourth Proportional to 78,368.42, 108,148.82 and 42,558.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,368.42 : 108,148.82 = 42,558.72 : x
2. Step 2: Convert to fraction form
   78,368.42/108,148.82 = 42,558.72/x
3. Step 3: Cross multiply
   78,368.42x = 108,148.82 × 42,558.72
4. Step 4: Simplify right side
   78,368.42x = 4,602,675,135.92
5. Step 5: Solve for x
   x = 4,602,675,135.92/78,368.42
6. Step 6: Final answer
   x = 58,731.25