Finding the Fourth Proportional to 172,333.11, 258,499.76 and 78,773.25

Step by Step Solution

1. Step 1: Write the proportion equation
   172,333.11 : 258,499.76 = 78,773.25 : x
2. Step 2: Convert to fraction form
   172,333.11/258,499.76 = 78,773.25/x
3. Step 3: Cross multiply
   172,333.11x = 258,499.76 × 78,773.25
4. Step 4: Simplify right side
   172,333.11x = 20,362,866,219.42
5. Step 5: Solve for x
   x = 20,362,866,219.42/172,333.11
6. Step 6: Final answer
   x = 118,159.92