Finding the Fourth Proportional to 12,990,036.56, 17,925,807.24 and 7,189,061.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,990,036.56 : 17,925,807.24 = 7,189,061.84 : x
2. Step 2: Convert to fraction form
   12,990,036.56/17,925,807.24 = 7,189,061.84/x
3. Step 3: Cross multiply
   12,990,036.56x = 17,925,807.24 × 7,189,061.84
4. Step 4: Simplify right side
   12,990,036.56x = 128,869,736,780,279.70
5. Step 5: Solve for x
   x = 128,869,736,780,279.70/12,990,036.56
6. Step 6: Final answer
   x = 9,920,660.05