Finding the Fourth Proportional to 9,918.55, 14,870.54 and 4,728.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.55 : 14,870.54 = 4,728.07 : x
2. Step 2: Convert to fraction form
   9,918.55/14,870.54 = 4,728.07/x
3. Step 3: Cross multiply
   9,918.55x = 14,870.54 × 4,728.07
4. Step 4: Simplify right side
   9,918.55x = 70,308,957.87
5. Step 5: Solve for x
   x = 70,308,957.87/9,918.55
6. Step 6: Final answer
   x = 7,088.63