Finding the Fourth Proportional to 139,068.88, 191,915.04 and 75,406.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,068.88 : 191,915.04 = 75,406.72 : x
2. Step 2: Convert to fraction form
   139,068.88/191,915.04 = 75,406.72/x
3. Step 3: Cross multiply
   139,068.88x = 191,915.04 × 75,406.72
4. Step 4: Simplify right side
   139,068.88x = 14,471,683,685.07
5. Step 5: Solve for x
   x = 14,471,683,685.07/139,068.88
6. Step 6: Final answer
   x = 104,061.27