Finding the Fourth Proportional to 129,510,145.94, 194,365,957.59 and 90,394,484.54

Step by Step Solution

1. Step 1: Write the proportion equation
   129,510,145.94 : 194,365,957.59 = 90,394,484.54 : x
2. Step 2: Convert to fraction form
   129,510,145.94/194,365,957.59 = 90,394,484.54/x
3. Step 3: Cross multiply
   129,510,145.94x = 194,365,957.59 × 90,394,484.54
4. Step 4: Simplify right side
   129,510,145.94x = 17,569,610,547,499,720
5. Step 5: Solve for x
   x = 17,569,610,547,499,720/129,510,145.94
6. Step 6: Final answer
   x = 135,662,039.61