Finding the Fourth Proportional to 128,870.40, 193,354.20 and 62,369.40

Step by Step Solution

1. Step 1: Write the proportion equation
   128,870.40 : 193,354.20 = 62,369.40 : x
2. Step 2: Convert to fraction form
   128,870.40/193,354.20 = 62,369.40/x
3. Step 3: Cross multiply
   128,870.40x = 193,354.20 × 62,369.40
4. Step 4: Simplify right side
   128,870.40x = 12,059,385,441.48
5. Step 5: Solve for x
   x = 12,059,385,441.48/128,870.40
6. Step 6: Final answer
   x = 93,577.62