Finding the Fourth Proportional to 42,677.28, 64,018.76 and 13,095.27

Step by Step Solution

1. Step 1: Write the proportion equation
   42,677.28 : 64,018.76 = 13,095.27 : x
2. Step 2: Convert to fraction form
   42,677.28/64,018.76 = 13,095.27/x
3. Step 3: Cross multiply
   42,677.28x = 64,018.76 × 13,095.27
4. Step 4: Simplify right side
   42,677.28x = 838,342,881.79
5. Step 5: Solve for x
   x = 838,342,881.79/42,677.28
6. Step 6: Final answer
   x = 19,643.77