Finding the Fourth Proportional to 143,991.88, 216,090.72 and 64,051.36

Step by Step Solution

1. Step 1: Write the proportion equation
   143,991.88 : 216,090.72 = 64,051.36 : x
2. Step 2: Convert to fraction form
   143,991.88/216,090.72 = 64,051.36/x
3. Step 3: Cross multiply
   143,991.88x = 216,090.72 × 64,051.36
4. Step 4: Simplify right side
   143,991.88x = 13,840,904,499.38
5. Step 5: Solve for x
   x = 13,840,904,499.38/143,991.88
6. Step 6: Final answer
   x = 96,122.81