Finding the Fourth Proportional to 109,688.42, 164,618.43 and 56,378.25

Step by Step Solution

1. Step 1: Write the proportion equation
   109,688.42 : 164,618.43 = 56,378.25 : x
2. Step 2: Convert to fraction form
   109,688.42/164,618.43 = 56,378.25/x
3. Step 3: Cross multiply
   109,688.42x = 164,618.43 × 56,378.25
4. Step 4: Simplify right side
   109,688.42x = 9,280,898,210.99
5. Step 5: Solve for x
   x = 9,280,898,210.99/109,688.42
6. Step 6: Final answer
   x = 84,611.47