Finding the Fourth Proportional to 83,978.89, 115,888.86 and 48,166.61

Step by Step Solution

1. Step 1: Write the proportion equation
   83,978.89 : 115,888.86 = 48,166.61 : x
2. Step 2: Convert to fraction form
   83,978.89/115,888.86 = 48,166.61/x
3. Step 3: Cross multiply
   83,978.89x = 115,888.86 × 48,166.61
4. Step 4: Simplify right side
   83,978.89x = 5,581,973,595.40
5. Step 5: Solve for x
   x = 5,581,973,595.40/83,978.89
6. Step 6: Final answer
   x = 66,468.77