Finding the Fourth Proportional to 21,141,784, 31,712,676 and 5,185,432

Step by Step Solution

1. Step 1: Write the proportion equation
   21,141,784 : 31,712,676 = 5,185,432 : x
2. Step 2: Convert to fraction form
   21,141,784/31,712,676 = 5,185,432/x
3. Step 3: Cross multiply
   21,141,784x = 31,712,676 × 5,185,432
4. Step 4: Simplify right side
   21,141,784x = 164,443,924,936,032
5. Step 5: Solve for x
   x = 164,443,924,936,032/21,141,784
6. Step 6: Final answer
   x = 7,778,148