Finding the Fourth Proportional to 42,755.76, 64,141.02 and 19,071.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,755.76 : 64,141.02 = 19,071.72 : x
2. Step 2: Convert to fraction form
   42,755.76/64,141.02 = 19,071.72/x
3. Step 3: Cross multiply
   42,755.76x = 64,141.02 × 19,071.72
4. Step 4: Simplify right side
   42,755.76x = 1,223,279,573.95
5. Step 5: Solve for x
   x = 1,223,279,573.95/42,755.76
6. Step 6: Final answer
   x = 28,610.87