Finding the Fourth Proportional to 139,388,684.46, 192,356,542.89 and 77,507,694.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,388,684.46 : 192,356,542.89 = 77,507,694.42 : x
2. Step 2: Convert to fraction form
   139,388,684.46/192,356,542.89 = 77,507,694.42/x
3. Step 3: Cross multiply
   139,388,684.46x = 192,356,542.89 × 77,507,694.42
4. Step 4: Simplify right side
   139,388,684.46x = 14,909,112,146,005,742
5. Step 5: Solve for x
   x = 14,909,112,146,005,742/139,388,684.46
6. Step 6: Final answer
   x = 106,960,706.34