Finding the Fourth Proportional to 78,880,862.18, 118,859,712.59 and 64,818,933.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78,880,862.18 : 118,859,712.59 = 64,818,933.32 : x
2. Step 2: Convert to fraction form
   78,880,862.18/118,859,712.59 = 64,818,933.32/x
3. Step 3: Cross multiply
   78,880,862.18x = 118,859,712.59 × 64,818,933.32
4. Step 4: Simplify right side
   78,880,862.18x = 7,704,359,783,887,181
5. Step 5: Solve for x
   x = 7,704,359,783,887,181/78,880,862.18
6. Step 6: Final answer
   x = 97,670,836.39