Finding the Fourth Proportional to 42,678.47, 64,017.72 and 14,598.80

Step by Step Solution

1. Step 1: Write the proportion equation
   42,678.47 : 64,017.72 = 14,598.80 : x
2. Step 2: Convert to fraction form
   42,678.47/64,017.72 = 14,598.80/x
3. Step 3: Cross multiply
   42,678.47x = 64,017.72 × 14,598.80
4. Step 4: Simplify right side
   42,678.47x = 934,581,570.65
5. Step 5: Solve for x
   x = 934,581,570.65/42,678.47
6. Step 6: Final answer
   x = 21,898.20