Finding the Fourth Proportional to 129,492,061.30, 194,238,091.95 and 128,736,234.10

Step by Step Solution

1. Step 1: Write the proportion equation
   129,492,061.30 : 194,238,091.95 = 128,736,234.10 : x
2. Step 2: Convert to fraction form
   129,492,061.30/194,238,091.95 = 128,736,234.10/x
3. Step 3: Cross multiply
   129,492,061.30x = 194,238,091.95 × 128,736,234.10
4. Step 4: Simplify right side
   129,492,061.30x = 25,005,480,476,412,524
5. Step 5: Solve for x
   x = 25,005,480,476,412,524/129,492,061.30
6. Step 6: Final answer
   x = 193,104,351.15