Finding the Fourth Proportional to 74,978.78, 112,425.64 and 30,553.52

Step by Step Solution

1. Step 1: Write the proportion equation
   74,978.78 : 112,425.64 = 30,553.52 : x
2. Step 2: Convert to fraction form
   74,978.78/112,425.64 = 30,553.52/x
3. Step 3: Cross multiply
   74,978.78x = 112,425.64 × 30,553.52
4. Step 4: Simplify right side
   74,978.78x = 3,434,998,401.74
5. Step 5: Solve for x
   x = 3,434,998,401.74/74,978.78
6. Step 6: Final answer
   x = 45,812.94