Finding the Fourth Proportional to 143,429.59, 215,142.63 and 64,488.07

Step by Step Solution

1. Step 1: Write the proportion equation
   143,429.59 : 215,142.63 = 64,488.07 : x
2. Step 2: Convert to fraction form
   143,429.59/215,142.63 = 64,488.07/x
3. Step 3: Cross multiply
   143,429.59x = 215,142.63 × 64,488.07
4. Step 4: Simplify right side
   143,429.59x = 13,874,132,983.42
5. Step 5: Solve for x
   x = 13,874,132,983.42/143,429.59
6. Step 6: Final answer
   x = 96,731.32