Finding the Third Proportional to 3,312,428 and 4,859,280

Step by Step Solution

1. Step 1: Write the proportion equation
   3,312,428 : 4,859,280 = 4,859,280 : x
2. Step 2: Convert to fraction form
   3,312,428/4,859,280 = 4,859,280/x
3. Step 3: Cross multiply
   3,312,428x = 4,859,280 × 4,859,280
4. Step 4: Simplify right side
   3,312,428x = 23,612,602,118,400
5. Step 5: Solve for x
   x = 23,612,602,118,400/3,312,428
6. Step 6: Final answer
   x = 7,128,487.66