Finding the Fourth Proportional to 139,368.01, 192,354.81 and 90,885.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,368.01 : 192,354.81 = 90,885.78 : x
2. Step 2: Convert to fraction form
   139,368.01/192,354.81 = 90,885.78/x
3. Step 3: Cross multiply
   139,368.01x = 192,354.81 × 90,885.78
4. Step 4: Simplify right side
   139,368.01x = 17,482,316,943.60
5. Step 5: Solve for x
   x = 17,482,316,943.60/139,368.01
6. Step 6: Final answer
   x = 125,439.96