Finding the Fourth Proportional to 65,707,956.96, 90,689,111.09 and 42,215,860.68

Step by Step Solution

1. Step 1: Write the proportion equation
   65,707,956.96 : 90,689,111.09 = 42,215,860.68 : x
2. Step 2: Convert to fraction form
   65,707,956.96/90,689,111.09 = 42,215,860.68/x
3. Step 3: Cross multiply
   65,707,956.96x = 90,689,111.09 × 42,215,860.68
4. Step 4: Simplify right side
   65,707,956.96x = 3,828,518,878,968,483
5. Step 5: Solve for x
   x = 3,828,518,878,968,483/65,707,956.96
6. Step 6: Final answer
   x = 58,265,681.30