Finding the Fourth Proportional to 2,120,025, 2,925,634.50 and 1,215,131.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120,025 : 2,925,634.50 = 1,215,131.88 : x
2. Step 2: Convert to fraction form
   2,120,025/2,925,634.50 = 1,215,131.88/x
3. Step 3: Cross multiply
   2,120,025x = 2,925,634.50 × 1,215,131.88
4. Step 4: Simplify right side
   2,120,025x = 3,555,031,750,177.86
5. Step 5: Solve for x
   x = 3,555,031,750,177.86/2,120,025
6. Step 6: Final answer
   x = 1,676,881.99