Finding the Fourth Proportional to 108,900.96, 163,393.69 and 42,387.81

Step by Step Solution

1. Step 1: Write the proportion equation
   108,900.96 : 163,393.69 = 42,387.81 : x
2. Step 2: Convert to fraction form
   108,900.96/163,393.69 = 42,387.81/x
3. Step 3: Cross multiply
   108,900.96x = 163,393.69 × 42,387.81
4. Step 4: Simplify right side
   108,900.96x = 6,925,900,686.92
5. Step 5: Solve for x
   x = 6,925,900,686.92/108,900.96
6. Step 6: Final answer
   x = 63,598.16