Finding the Fourth Proportional to 70,810.07, 97,717.89 and 38,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,810.07 : 97,717.89 = 38,978.72 : x
2. Step 2: Convert to fraction form
   70,810.07/97,717.89 = 38,978.72/x
3. Step 3: Cross multiply
   70,810.07x = 97,717.89 × 38,978.72
4. Step 4: Simplify right side
   70,810.07x = 3,808,918,297.32
5. Step 5: Solve for x
   x = 3,808,918,297.32/70,810.07
6. Step 6: Final answer
   x = 53,790.63