Finding the Fourth Proportional to 2,128,521.60, 2,936,973.04 and 1,257,498.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,521.60 : 2,936,973.04 = 1,257,498.12 : x
2. Step 2: Convert to fraction form
   2,128,521.60/2,936,973.04 = 1,257,498.12/x
3. Step 3: Cross multiply
   2,128,521.60x = 2,936,973.04 × 1,257,498.12
4. Step 4: Simplify right side
   2,128,521.60x = 3,693,238,076,290.69
5. Step 5: Solve for x
   x = 3,693,238,076,290.69/2,128,521.60
6. Step 6: Final answer
   x = 1,735,118.91