Finding the Fourth Proportional to 139,641.63, 192,699.72 and 75,979.46

Step by Step Solution

1. Step 1: Write the proportion equation
   139,641.63 : 192,699.72 = 75,979.46 : x
2. Step 2: Convert to fraction form
   139,641.63/192,699.72 = 75,979.46/x
3. Step 3: Cross multiply
   139,641.63x = 192,699.72 × 75,979.46
4. Step 4: Simplify right side
   139,641.63x = 14,641,219,704.25
5. Step 5: Solve for x
   x = 14,641,219,704.25/139,641.63
6. Step 6: Final answer
   x = 104,848.53