Finding the Fourth Proportional to 42,888.76, 64,330.04 and 13,305.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,888.76 : 64,330.04 = 13,305.82 : x
2. Step 2: Convert to fraction form
   42,888.76/64,330.04 = 13,305.82/x
3. Step 3: Cross multiply
   42,888.76x = 64,330.04 × 13,305.82
4. Step 4: Simplify right side
   42,888.76x = 855,963,932.83
5. Step 5: Solve for x
   x = 855,963,932.83/42,888.76
6. Step 6: Final answer
   x = 19,957.77