Finding the Fourth Proportional to 42,724.58, 64,094.16 and 13,141.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,724.58 : 64,094.16 = 13,141.76 : x
2. Step 2: Convert to fraction form
   42,724.58/64,094.16 = 13,141.76/x
3. Step 3: Cross multiply
   42,724.58x = 64,094.16 × 13,141.76
4. Step 4: Simplify right side
   42,724.58x = 842,310,068.12
5. Step 5: Solve for x
   x = 842,310,068.12/42,724.58
6. Step 6: Final answer
   x = 19,714.88