Finding the Fourth Proportional to 42,815.04, 64,139.46 and 31,549.94

Step by Step Solution

1. Step 1: Write the proportion equation
   42,815.04 : 64,139.46 = 31,549.94 : x
2. Step 2: Convert to fraction form
   42,815.04/64,139.46 = 31,549.94/x
3. Step 3: Cross multiply
   42,815.04x = 64,139.46 × 31,549.94
4. Step 4: Simplify right side
   42,815.04x = 2,023,596,114.63
5. Step 5: Solve for x
   x = 2,023,596,114.63/42,815.04
6. Step 6: Final answer
   x = 47,263.67