Finding the Fourth Proportional to 78,880,861.68, 118,859,711.83 and 64,818,932.82

Step by Step Solution

1. Step 1: Write the proportion equation
   78,880,861.68 : 118,859,711.83 = 64,818,932.82 : x
2. Step 2: Convert to fraction form
   78,880,861.68/118,859,711.83 = 64,818,932.82/x
3. Step 3: Cross multiply
   78,880,861.68x = 118,859,711.83 × 64,818,932.82
4. Step 4: Simplify right side
   78,880,861.68x = 7,704,359,676,113,329
5. Step 5: Solve for x
   x = 7,704,359,676,113,329/78,880,861.68
6. Step 6: Final answer
   x = 97,670,835.64