Finding the Fourth Proportional to 139,043.34, 191,777.90 and 91,279.26

Step by Step Solution

1. Step 1: Write the proportion equation
   139,043.34 : 191,777.90 = 91,279.26 : x
2. Step 2: Convert to fraction form
   139,043.34/191,777.90 = 91,279.26/x
3. Step 3: Cross multiply
   139,043.34x = 191,777.90 × 91,279.26
4. Step 4: Simplify right side
   139,043.34x = 17,505,344,339.96
5. Step 5: Solve for x
   x = 17,505,344,339.96/139,043.34
6. Step 6: Final answer
   x = 125,898.47