Finding the Fourth Proportional to 139,903.59, 193,061.34 and 76,240.02

Step by Step Solution

1. Step 1: Write the proportion equation
   139,903.59 : 193,061.34 = 76,240.02 : x
2. Step 2: Convert to fraction form
   139,903.59/193,061.34 = 76,240.02/x
3. Step 3: Cross multiply
   139,903.59x = 193,061.34 × 76,240.02
4. Step 4: Simplify right side
   139,903.59x = 14,719,000,422.83
5. Step 5: Solve for x
   x = 14,719,000,422.83/139,903.59
6. Step 6: Final answer
   x = 105,208.17