Finding the Fourth Proportional to 42,784.08, 64,152.63 and 13,193.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42,784.08 : 64,152.63 = 13,193.70 : x
2. Step 2: Convert to fraction form
   42,784.08/64,152.63 = 13,193.70/x
3. Step 3: Cross multiply
   42,784.08x = 64,152.63 × 13,193.70
4. Step 4: Simplify right side
   42,784.08x = 846,410,554.43
5. Step 5: Solve for x
   x = 846,410,554.43/42,784.08
6. Step 6: Final answer
   x = 19,783.31