Finding the Fourth Proportional to 42,846.99, 64,279.86 and 12,859.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,846.99 : 64,279.86 = 12,859.98 : x
2. Step 2: Convert to fraction form
   42,846.99/64,279.86 = 12,859.98/x
3. Step 3: Cross multiply
   42,846.99x = 64,279.86 × 12,859.98
4. Step 4: Simplify right side
   42,846.99x = 826,637,714.00
5. Step 5: Solve for x
   x = 826,637,714.00/42,846.99
6. Step 6: Final answer
   x = 19,292.78