Finding the Fourth Proportional to 139,992.96, 209,870.46 and 65,156.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,992.96 : 209,870.46 = 65,156.52 : x
2. Step 2: Convert to fraction form
   139,992.96/209,870.46 = 65,156.52/x
3. Step 3: Cross multiply
   139,992.96x = 209,870.46 × 65,156.52
4. Step 4: Simplify right side
   139,992.96x = 13,674,428,824.40
5. Step 5: Solve for x
   x = 13,674,428,824.40/139,992.96
6. Step 6: Final answer
   x = 97,679.40