Finding the Fourth Proportional to 42,826.02, 64,254.24 and 19,131.39

Step by Step Solution

1. Step 1: Write the proportion equation
   42,826.02 : 64,254.24 = 19,131.39 : x
2. Step 2: Convert to fraction form
   42,826.02/64,254.24 = 19,131.39/x
3. Step 3: Cross multiply
   42,826.02x = 64,254.24 × 19,131.39
4. Step 4: Simplify right side
   42,826.02x = 1,229,272,870.79
5. Step 5: Solve for x
   x = 1,229,272,870.79/42,826.02
6. Step 6: Final answer
   x = 28,703.88