Finding the Fourth Proportional to 21,060,272, 31,590,408 and 5,103,920

Step by Step Solution

1. Step 1: Write the proportion equation
   21,060,272 : 31,590,408 = 5,103,920 : x
2. Step 2: Convert to fraction form
   21,060,272/31,590,408 = 5,103,920/x
3. Step 3: Cross multiply
   21,060,272x = 31,590,408 × 5,103,920
4. Step 4: Simplify right side
   21,060,272x = 161,234,915,199,360
5. Step 5: Solve for x
   x = 161,234,915,199,360/21,060,272
6. Step 6: Final answer
   x = 7,655,880