Finding the Fourth Proportional to 139,899.51, 193,061.37 and 76,237.32

Step by Step Solution

1. Step 1: Write the proportion equation
   139,899.51 : 193,061.37 = 76,237.32 : x
2. Step 2: Convert to fraction form
   139,899.51/193,061.37 = 76,237.32/x
3. Step 3: Cross multiply
   139,899.51x = 193,061.37 × 76,237.32
4. Step 4: Simplify right side
   139,899.51x = 14,718,481,444.33
5. Step 5: Solve for x
   x = 14,718,481,444.33/139,899.51
6. Step 6: Final answer
   x = 105,207.53