Finding the Fourth Proportional to 42,897.39, 64,274.95 and 30,355.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,897.39 : 64,274.95 = 30,355.25 : x
2. Step 2: Convert to fraction form
   42,897.39/64,274.95 = 30,355.25/x
3. Step 3: Cross multiply
   42,897.39x = 64,274.95 × 30,355.25
4. Step 4: Simplify right side
   42,897.39x = 1,951,082,175.99
5. Step 5: Solve for x
   x = 1,951,082,175.99/42,897.39
6. Step 6: Final answer
   x = 45,482.54