Finding the Fourth Proportional to 71,251, 98,317.86 and 39,415.57

Step by Step Solution

1. Step 1: Write the proportion equation
   71,251 : 98,317.86 = 39,415.57 : x
2. Step 2: Convert to fraction form
   71,251/98,317.86 = 39,415.57/x
3. Step 3: Cross multiply
   71,251x = 98,317.86 × 39,415.57
4. Step 4: Simplify right side
   71,251x = 3,875,254,493.08
5. Step 5: Solve for x
   x = 3,875,254,493.08/71,251
6. Step 6: Final answer
   x = 54,388.77