Finding the Fourth Proportional to 118,557.56, 163,607.12 and 64,842.40

Step by Step Solution

1. Step 1: Write the proportion equation
   118,557.56 : 163,607.12 = 64,842.40 : x
2. Step 2: Convert to fraction form
   118,557.56/163,607.12 = 64,842.40/x
3. Step 3: Cross multiply
   118,557.56x = 163,607.12 × 64,842.40
4. Step 4: Simplify right side
   118,557.56x = 10,608,678,317.89
5. Step 5: Solve for x
   x = 10,608,678,317.89/118,557.56
6. Step 6: Final answer
   x = 89,481.25