Finding the Fourth Proportional to 78,034.78, 107,688.78 and 42,225.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,034.78 : 107,688.78 = 42,225.49 : x
2. Step 2: Convert to fraction form
   78,034.78/107,688.78 = 42,225.49/x
3. Step 3: Cross multiply
   78,034.78x = 107,688.78 × 42,225.49
4. Step 4: Simplify right side
   78,034.78x = 4,547,211,503.00
5. Step 5: Solve for x
   x = 4,547,211,503.00/78,034.78
6. Step 6: Final answer
   x = 58,271.60