Finding the Fourth Proportional to 42,789.77, 64,199.85 and 19,095.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,789.77 : 64,199.85 = 19,095.15 : x
2. Step 2: Convert to fraction form
   42,789.77/64,199.85 = 19,095.15/x
3. Step 3: Cross multiply
   42,789.77x = 64,199.85 × 19,095.15
4. Step 4: Simplify right side
   42,789.77x = 1,225,905,934.87
5. Step 5: Solve for x
   x = 1,225,905,934.87/42,789.77
6. Step 6: Final answer
   x = 28,649.51