Finding the Fourth Proportional to 143,594.72, 215,392.20 and 64,616.72

Step by Step Solution

1. Step 1: Write the proportion equation
   143,594.72 : 215,392.20 = 64,616.72 : x
2. Step 2: Convert to fraction form
   143,594.72/215,392.20 = 64,616.72/x
3. Step 3: Cross multiply
   143,594.72x = 215,392.20 × 64,616.72
4. Step 4: Simplify right side
   143,594.72x = 13,917,937,477.58
5. Step 5: Solve for x
   x = 13,917,937,477.58/143,594.72
6. Step 6: Final answer
   x = 96,925.13