Finding the Fourth Proportional to 102,142.80, 153,214.56 and 49,654.80

Step by Step Solution

1. Step 1: Write the proportion equation
   102,142.80 : 153,214.56 = 49,654.80 : x
2. Step 2: Convert to fraction form
   102,142.80/153,214.56 = 49,654.80/x
3. Step 3: Cross multiply
   102,142.80x = 153,214.56 × 49,654.80
4. Step 4: Simplify right side
   102,142.80x = 7,607,838,333.89
5. Step 5: Solve for x
   x = 7,607,838,333.89/102,142.80
6. Step 6: Final answer
   x = 74,482.38