Finding the Fourth Proportional to 42,927.98, 64,393.79 and 13,346.37

Step by Step Solution

1. Step 1: Write the proportion equation
   42,927.98 : 64,393.79 = 13,346.37 : x
2. Step 2: Convert to fraction form
   42,927.98/64,393.79 = 13,346.37/x
3. Step 3: Cross multiply
   42,927.98x = 64,393.79 × 13,346.37
4. Step 4: Simplify right side
   42,927.98x = 859,423,280.31
5. Step 5: Solve for x
   x = 859,423,280.31/42,927.98
6. Step 6: Final answer
   x = 20,020.12