Finding the Fourth Proportional to 42,894.95, 64,350.93 and 13,311.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,894.95 : 64,350.93 = 13,311.52 : x
2. Step 2: Convert to fraction form
   42,894.95/64,350.93 = 13,311.52/x
3. Step 3: Cross multiply
   42,894.95x = 64,350.93 × 13,311.52
4. Step 4: Simplify right side
   42,894.95x = 856,608,852.59
5. Step 5: Solve for x
   x = 856,608,852.59/42,894.95
6. Step 6: Final answer
   x = 19,969.92