Finding the Fourth Proportional to 139,886.25, 193,043.27 and 76,224.05

Step by Step Solution

1. Step 1: Write the proportion equation
   139,886.25 : 193,043.27 = 76,224.05 : x
2. Step 2: Convert to fraction form
   139,886.25/193,043.27 = 76,224.05/x
3. Step 3: Cross multiply
   139,886.25x = 193,043.27 × 76,224.05
4. Step 4: Simplify right side
   139,886.25x = 14,714,538,518.31
5. Step 5: Solve for x
   x = 14,714,538,518.31/139,886.25
6. Step 6: Final answer
   x = 105,189.31