Finding the Fourth Proportional to 42,888.82, 64,334.04 and 13,307.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,888.82 : 64,334.04 = 13,307.62 : x
2. Step 2: Convert to fraction form
   42,888.82/64,334.04 = 13,307.62/x
3. Step 3: Cross multiply
   42,888.82x = 64,334.04 × 13,307.62
4. Step 4: Simplify right side
   42,888.82x = 856,132,957.38
5. Step 5: Solve for x
   x = 856,132,957.38/42,888.82
6. Step 6: Final answer
   x = 19,961.68