Finding the Fourth Proportional to 69,978,607.21, 104,960,823.72 and 18,865,792.81

Step by Step Solution

1. Step 1: Write the proportion equation
   69,978,607.21 : 104,960,823.72 = 18,865,792.81 : x
2. Step 2: Convert to fraction form
   69,978,607.21/104,960,823.72 = 18,865,792.81/x
3. Step 3: Cross multiply
   69,978,607.21x = 104,960,823.72 × 18,865,792.81
4. Step 4: Simplify right side
   69,978,607.21x = 1,980,169,153,468,453.25
5. Step 5: Solve for x
   x = 1,980,169,153,468,453.25/69,978,607.21
6. Step 6: Final answer
   x = 28,296,778.58