Finding the Fourth Proportional to 1,623,018.08, 2,239,060.91 and 978,071.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,623,018.08 : 2,239,060.91 = 978,071.78 : x
2. Step 2: Convert to fraction form
   1,623,018.08/2,239,060.91 = 978,071.78/x
3. Step 3: Cross multiply
   1,623,018.08x = 2,239,060.91 × 978,071.78
4. Step 4: Simplify right side
   1,623,018.08x = 2,189,962,273,686.46
5. Step 5: Solve for x
   x = 2,189,962,273,686.46/1,623,018.08
6. Step 6: Final answer
   x = 1,349,314.78