Finding the Fourth Proportional to 139,317.90, 192,289.32 and 91,575.69

Step by Step Solution

1. Step 1: Write the proportion equation
   139,317.90 : 192,289.32 = 91,575.69 : x
2. Step 2: Convert to fraction form
   139,317.90/192,289.32 = 91,575.69/x
3. Step 3: Cross multiply
   139,317.90x = 192,289.32 × 91,575.69
4. Step 4: Simplify right side
   139,317.90x = 17,609,027,158.63
5. Step 5: Solve for x
   x = 17,609,027,158.63/139,317.90
6. Step 6: Final answer
   x = 126,394.58