Finding the Fourth Proportional to 42,848.63, 64,314.51 and 20,677.61

Step by Step Solution

1. Step 1: Write the proportion equation
   42,848.63 : 64,314.51 = 20,677.61 : x
2. Step 2: Convert to fraction form
   42,848.63/64,314.51 = 20,677.61/x
3. Step 3: Cross multiply
   42,848.63x = 64,314.51 × 20,677.61
4. Step 4: Simplify right side
   42,848.63x = 1,329,870,438.37
5. Step 5: Solve for x
   x = 1,329,870,438.37/42,848.63
6. Step 6: Final answer
   x = 31,036.48