Finding the Fourth Proportional to 69,978,630.55, 104,960,858.59 and 18,865,816.15

Step by Step Solution

1. Step 1: Write the proportion equation
   69,978,630.55 : 104,960,858.59 = 18,865,816.15 : x
2. Step 2: Convert to fraction form
   69,978,630.55/104,960,858.59 = 18,865,816.15/x
3. Step 3: Cross multiply
   69,978,630.55x = 104,960,858.59 × 18,865,816.15
4. Step 4: Simplify right side
   69,978,630.55x = 1,980,172,261,105,088.25
5. Step 5: Solve for x
   x = 1,980,172,261,105,088.25/69,978,630.55
6. Step 6: Final answer
   x = 28,296,813.55