Finding the Fourth Proportional to 42,788,268.86, 64,185,088.10 and 12,085,252.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,788,268.86 : 64,185,088.10 = 12,085,252.28 : x
2. Step 2: Convert to fraction form
   42,788,268.86/64,185,088.10 = 12,085,252.28/x
3. Step 3: Cross multiply
   42,788,268.86x = 64,185,088.10 × 12,085,252.28
4. Step 4: Simplify right side
   42,788,268.86x = 775,692,981,921,174.12
5. Step 5: Solve for x
   x = 775,692,981,921,174.12/42,788,268.86
6. Step 6: Final answer
   x = 18,128,636.72