Finding the Fourth Proportional to 70,900.78, 97,845.17 and 39,071.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,900.78 : 97,845.17 = 39,071.72 : x
2. Step 2: Convert to fraction form
   70,900.78/97,845.17 = 39,071.72/x
3. Step 3: Cross multiply
   70,900.78x = 97,845.17 × 39,071.72
4. Step 4: Simplify right side
   70,900.78x = 3,822,979,085.59
5. Step 5: Solve for x
   x = 3,822,979,085.59/70,900.78
6. Step 6: Final answer
   x = 53,920.13