Finding the Fourth Proportional to 61,271,719.20, 91,781,607.60 and 42,124,096.80

Step by Step Solution

1. Step 1: Write the proportion equation
   61,271,719.20 : 91,781,607.60 = 42,124,096.80 : x
2. Step 2: Convert to fraction form
   61,271,719.20/91,781,607.60 = 42,124,096.80/x
3. Step 3: Cross multiply
   61,271,719.20x = 91,781,607.60 × 42,124,096.80
4. Step 4: Simplify right side
   61,271,719.20x = 3,866,217,323,002,015
5. Step 5: Solve for x
   x = 3,866,217,323,002,015/61,271,719.20
6. Step 6: Final answer
   x = 63,099,540.43