Finding the Fourth Proportional to 143,519.02, 215,333.20 and 64,615.10

Step by Step Solution

1. Step 1: Write the proportion equation
   143,519.02 : 215,333.20 = 64,615.10 : x
2. Step 2: Convert to fraction form
   143,519.02/215,333.20 = 64,615.10/x
3. Step 3: Cross multiply
   143,519.02x = 215,333.20 × 64,615.10
4. Step 4: Simplify right side
   143,519.02x = 13,913,776,251.32
5. Step 5: Solve for x
   x = 13,913,776,251.32/143,519.02
6. Step 6: Final answer
   x = 96,947.26