Finding the Fourth Proportional to 42,761.88, 64,148.86 and 13,182.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,761.88 : 64,148.86 = 13,182.12 : x
2. Step 2: Convert to fraction form
   42,761.88/64,148.86 = 13,182.12/x
3. Step 3: Cross multiply
   42,761.88x = 64,148.86 × 13,182.12
4. Step 4: Simplify right side
   42,761.88x = 845,617,970.38
5. Step 5: Solve for x
   x = 845,617,970.38/42,761.88
6. Step 6: Final answer
   x = 19,775.04