Finding the Fourth Proportional to 78,558.72, 108,411.24 and 42,748.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,558.72 : 108,411.24 = 42,748.72 : x
2. Step 2: Convert to fraction form
   78,558.72/108,411.24 = 42,748.72/x
3. Step 3: Cross multiply
   78,558.72x = 108,411.24 × 42,748.72
4. Step 4: Simplify right side
   78,558.72x = 4,634,441,743.61
5. Step 5: Solve for x
   x = 4,634,441,743.61/78,558.72
6. Step 6: Final answer
   x = 58,993.35