Finding the Fourth Proportional to 1,382,978.50, 1,908,502.43 and 771,138.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382,978.50 : 1,908,502.43 = 771,138.62 : x
2. Step 2: Convert to fraction form
   1,382,978.50/1,908,502.43 = 771,138.62/x
3. Step 3: Cross multiply
   1,382,978.50x = 1,908,502.43 × 771,138.62
4. Step 4: Simplify right side
   1,382,978.50x = 1,471,719,936,835.95
5. Step 5: Solve for x
   x = 1,471,719,936,835.95/1,382,978.50
6. Step 6: Final answer
   x = 1,064,166.90