Finding the Fourth Proportional to 42,803.40, 64,525.89 and 39,948.96

Step by Step Solution

1. Step 1: Write the proportion equation
   42,803.40 : 64,525.89 = 39,948.96 : x
2. Step 2: Convert to fraction form
   42,803.40/64,525.89 = 39,948.96/x
3. Step 3: Cross multiply
   42,803.40x = 64,525.89 × 39,948.96
4. Step 4: Simplify right side
   42,803.40x = 2,577,742,198.57
5. Step 5: Solve for x
   x = 2,577,742,198.57/42,803.40
6. Step 6: Final answer
   x = 60,222.84