Finding the Fourth Proportional to 42,797.10, 64,210.86 and 19,102.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,797.10 : 64,210.86 = 19,102.50 : x
2. Step 2: Convert to fraction form
   42,797.10/64,210.86 = 19,102.50/x
3. Step 3: Cross multiply
   42,797.10x = 64,210.86 × 19,102.50
4. Step 4: Simplify right side
   42,797.10x = 1,226,587,953.15
5. Step 5: Solve for x
   x = 1,226,587,953.15/42,797.10
6. Step 6: Final answer
   x = 28,660.54