Finding the Fourth Proportional to 139,041.72, 191,775.64 and 91,277.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,041.72 : 191,775.64 = 91,277.64 : x
2. Step 2: Convert to fraction form
   139,041.72/191,775.64 = 91,277.64/x
3. Step 3: Cross multiply
   139,041.72x = 191,775.64 × 91,277.64
4. Step 4: Simplify right side
   139,041.72x = 17,504,827,828.69
5. Step 5: Solve for x
   x = 17,504,827,828.69/139,041.72
6. Step 6: Final answer
   x = 125,896.23