Finding the Fourth Proportional to 42,638,705, 63,958,068.42 and 11,937,807.36

Step by Step Solution

1. Step 1: Write the proportion equation
   42,638,705 : 63,958,068.42 = 11,937,807.36 : x
2. Step 2: Convert to fraction form
   42,638,705/63,958,068.42 = 11,937,807.36/x
3. Step 3: Cross multiply
   42,638,705x = 63,958,068.42 × 11,937,807.36
4. Step 4: Simplify right side
   42,638,705x = 763,519,099,915,659.50
5. Step 5: Solve for x
   x = 763,519,099,915,659.50/42,638,705
6. Step 6: Final answer
   x = 17,906,714.10