Finding the Fourth Proportional to 42,678.01, 64,014.18 and 13,093.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,678.01 : 64,014.18 = 13,093.30 : x
2. Step 2: Convert to fraction form
   42,678.01/64,014.18 = 13,093.30/x
3. Step 3: Cross multiply
   42,678.01x = 64,014.18 × 13,093.30
4. Step 4: Simplify right side
   42,678.01x = 838,156,862.99
5. Step 5: Solve for x
   x = 838,156,862.99/42,678.01
6. Step 6: Final answer
   x = 19,639.08