Finding the Fourth Proportional to 78,386.58, 108,114.20 and 54,501.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,386.58 : 108,114.20 = 54,501.30 : x
2. Step 2: Convert to fraction form
   78,386.58/108,114.20 = 54,501.30/x
3. Step 3: Cross multiply
   78,386.58x = 108,114.20 × 54,501.30
4. Step 4: Simplify right side
   78,386.58x = 5,892,364,448.46
5. Step 5: Solve for x
   x = 5,892,364,448.46/78,386.58
6. Step 6: Final answer
   x = 75,170.58