Finding the Fourth Proportional to 120,390,003.63, 166,139,055.38 and 65,385,860.13

Step by Step Solution

1. Step 1: Write the proportion equation
   120,390,003.63 : 166,139,055.38 = 65,385,860.13 : x
2. Step 2: Convert to fraction form
   120,390,003.63/166,139,055.38 = 65,385,860.13/x
3. Step 3: Cross multiply
   120,390,003.63x = 166,139,055.38 × 65,385,860.13
4. Step 4: Simplify right side
   120,390,003.63x = 10,863,145,037,370,468
5. Step 5: Solve for x
   x = 10,863,145,037,370,468/120,390,003.63
6. Step 6: Final answer
   x = 90,232,948.83