Finding the Fourth Proportional to 42,894.78, 64,253.61 and 31,813.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,894.78 : 64,253.61 = 31,813.98 : x
2. Step 2: Convert to fraction form
   42,894.78/64,253.61 = 31,813.98/x
3. Step 3: Cross multiply
   42,894.78x = 64,253.61 × 31,813.98
4. Step 4: Simplify right side
   42,894.78x = 2,044,163,063.47
5. Step 5: Solve for x
   x = 2,044,163,063.47/42,894.78
6. Step 6: Final answer
   x = 47,655.29