Finding the Fourth Proportional to 139,499.16, 192,510.45 and 77,410.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,499.16 : 192,510.45 = 77,410.92 : x
2. Step 2: Convert to fraction form
   139,499.16/192,510.45 = 77,410.92/x
3. Step 3: Cross multiply
   139,499.16x = 192,510.45 × 77,410.92
4. Step 4: Simplify right side
   139,499.16x = 14,902,410,322.20
5. Step 5: Solve for x
   x = 14,902,410,322.20/139,499.16
6. Step 6: Final answer
   x = 106,827.96