Finding the Fourth Proportional to 42,854.22, 64,296.72 and 19,159.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,854.22 : 64,296.72 = 19,159.74 : x
2. Step 2: Convert to fraction form
   42,854.22/64,296.72 = 19,159.74/x
3. Step 3: Cross multiply
   42,854.22x = 64,296.72 × 19,159.74
4. Step 4: Simplify right side
   42,854.22x = 1,231,908,438.05
5. Step 5: Solve for x
   x = 1,231,908,438.05/42,854.22
6. Step 6: Final answer
   x = 28,746.49