Finding the Fourth Proportional to 42,887.25, 64,259.82 and 30,345.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,887.25 : 64,259.82 = 30,345.12 : x
2. Step 2: Convert to fraction form
   42,887.25/64,259.82 = 30,345.12/x
3. Step 3: Cross multiply
   42,887.25x = 64,259.82 × 30,345.12
4. Step 4: Simplify right side
   42,887.25x = 1,949,971,949.08
5. Step 5: Solve for x
   x = 1,949,971,949.08/42,887.25
6. Step 6: Final answer
   x = 45,467.40