Finding the Fourth Proportional to 42,784.90, 64,176.15 and 19,411.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,784.90 : 64,176.15 = 19,411.30 : x
2. Step 2: Convert to fraction form
   42,784.90/64,176.15 = 19,411.30/x
3. Step 3: Cross multiply
   42,784.90x = 64,176.15 × 19,411.30
4. Step 4: Simplify right side
   42,784.90x = 1,245,742,500.50
5. Step 5: Solve for x
   x = 1,245,742,500.50/42,784.90
6. Step 6: Final answer
   x = 29,116.41