Finding the Fourth Proportional to 139,720.53, 209,463.25 and 60,775.30

Step by Step Solution

1. Step 1: Write the proportion equation
   139,720.53 : 209,463.25 = 60,775.30 : x
2. Step 2: Convert to fraction form
   139,720.53/209,463.25 = 60,775.30/x
3. Step 3: Cross multiply
   139,720.53x = 209,463.25 × 60,775.30
4. Step 4: Simplify right side
   139,720.53x = 12,730,191,857.73
5. Step 5: Solve for x
   x = 12,730,191,857.73/139,720.53
6. Step 6: Final answer
   x = 91,111.82