Finding the Fourth Proportional to 118,699.61, 163,807.52 and 64,983.78

Step by Step Solution

1. Step 1: Write the proportion equation
   118,699.61 : 163,807.52 = 64,983.78 : x
2. Step 2: Convert to fraction form
   118,699.61/163,807.52 = 64,983.78/x
3. Step 3: Cross multiply
   118,699.61x = 163,807.52 × 64,983.78
4. Step 4: Simplify right side
   118,699.61x = 10,644,831,517.11
5. Step 5: Solve for x
   x = 10,644,831,517.11/118,699.61
6. Step 6: Final answer
   x = 89,678.74