Finding the Fourth Proportional to 139,328.16, 192,303.48 and 91,585.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139,328.16 : 192,303.48 = 91,585.94 : x
2. Step 2: Convert to fraction form
   139,328.16/192,303.48 = 91,585.94/x
3. Step 3: Cross multiply
   139,328.16x = 192,303.48 × 91,585.94
4. Step 4: Simplify right side
   139,328.16x = 17,612,294,981.07
5. Step 5: Solve for x
   x = 17,612,294,981.07/139,328.16
6. Step 6: Final answer
   x = 126,408.72