Finding the Fourth Proportional to 65,139,380.80, 97,709,071.20 and 42,464,564.80

Step by Step Solution

1. Step 1: Write the proportion equation
   65,139,380.80 : 97,709,071.20 = 42,464,564.80 : x
2. Step 2: Convert to fraction form
   65,139,380.80/97,709,071.20 = 42,464,564.80/x
3. Step 3: Cross multiply
   65,139,380.80x = 97,709,071.20 × 42,464,564.80
4. Step 4: Simplify right side
   65,139,380.80x = 4,149,173,185,520,213.50
5. Step 5: Solve for x
   x = 4,149,173,185,520,213.50/65,139,380.80
6. Step 6: Final answer
   x = 63,696,847.20