Finding the Fourth Proportional to 138,705.60, 208,102.16 and 59,856.96

Step by Step Solution

1. Step 1: Write the proportion equation
   138,705.60 : 208,102.16 = 59,856.96 : x
2. Step 2: Convert to fraction form
   138,705.60/208,102.16 = 59,856.96/x
3. Step 3: Cross multiply
   138,705.60x = 208,102.16 × 59,856.96
4. Step 4: Simplify right side
   138,705.60x = 12,456,362,667.03
5. Step 5: Solve for x
   x = 12,456,362,667.03/138,705.60
6. Step 6: Final answer
   x = 89,804.32