Finding the Fourth Proportional to 103,085.78, 142,174.03 and 72,559.93

Step by Step Solution

1. Step 1: Write the proportion equation
   103,085.78 : 142,174.03 = 72,559.93 : x
2. Step 2: Convert to fraction form
   103,085.78/142,174.03 = 72,559.93/x
3. Step 3: Cross multiply
   103,085.78x = 142,174.03 × 72,559.93
4. Step 4: Simplify right side
   103,085.78x = 10,316,137,664.62
5. Step 5: Solve for x
   x = 10,316,137,664.62/103,085.78
6. Step 6: Final answer
   x = 100,073.33