Finding the Fourth Proportional to 72,146,995.74, 99,564,129.59 and 39,108,342.13

Step by Step Solution

1. Step 1: Write the proportion equation
   72,146,995.74 : 99,564,129.59 = 39,108,342.13 : x
2. Step 2: Convert to fraction form
   72,146,995.74/99,564,129.59 = 39,108,342.13/x
3. Step 3: Cross multiply
   72,146,995.74x = 99,564,129.59 × 39,108,342.13
4. Step 4: Simplify right side
   72,146,995.74x = 3,893,788,043,436,924
5. Step 5: Solve for x
   x = 3,893,788,043,436,924/72,146,995.74
6. Step 6: Final answer
   x = 53,970,203.52