Finding the Fourth Proportional to 42,869.30, 64,402.50 and 30,248.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,869.30 : 64,402.50 = 30,248.10 : x
2. Step 2: Convert to fraction form
   42,869.30/64,402.50 = 30,248.10/x
3. Step 3: Cross multiply
   42,869.30x = 64,402.50 × 30,248.10
4. Step 4: Simplify right side
   42,869.30x = 1,948,053,260.25
5. Step 5: Solve for x
   x = 1,948,053,260.25/42,869.30
6. Step 6: Final answer
   x = 45,441.69