Finding the Fourth Proportional to 78,518.39, 117,762.56 and 30,487.00

Step by Step Solution

1. Step 1: Write the proportion equation
   78,518.39 : 117,762.56 = 30,487.00 : x
2. Step 2: Convert to fraction form
   78,518.39/117,762.56 = 30,487.00/x
3. Step 3: Cross multiply
   78,518.39x = 117,762.56 × 30,487.00
4. Step 4: Simplify right side
   78,518.39x = 3,590,226,796.10
5. Step 5: Solve for x
   x = 3,590,226,796.10/78,518.39
6. Step 6: Final answer
   x = 45,724.66