Finding the Fourth Proportional to 42,887.82, 64,332.54 and 13,306.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,887.82 : 64,332.54 = 13,306.62 : x
2. Step 2: Convert to fraction form
   42,887.82/64,332.54 = 13,306.62/x
3. Step 3: Cross multiply
   42,887.82x = 64,332.54 × 13,306.62
4. Step 4: Simplify right side
   42,887.82x = 856,048,663.41
5. Step 5: Solve for x
   x = 856,048,663.41/42,887.82
6. Step 6: Final answer
   x = 19,960.18