Finding the Fourth Proportional to 139,061.07, 191,911.31 and 77,814.14

Step by Step Solution

1. Step 1: Write the proportion equation
   139,061.07 : 191,911.31 = 77,814.14 : x
2. Step 2: Convert to fraction form
   139,061.07/191,911.31 = 77,814.14/x
3. Step 3: Cross multiply
   139,061.07x = 191,911.31 × 77,814.14
4. Step 4: Simplify right side
   139,061.07x = 14,933,412,778.90
5. Step 5: Solve for x
   x = 14,933,412,778.90/139,061.07
6. Step 6: Final answer
   x = 107,387.44