Finding the Fourth Proportional to 21,155,875.32, 29,199,294.81 and 13,722,748.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,155,875.32 : 29,199,294.81 = 13,722,748.86 : x
2. Step 2: Convert to fraction form
   21,155,875.32/29,199,294.81 = 13,722,748.86/x
3. Step 3: Cross multiply
   21,155,875.32x = 29,199,294.81 × 13,722,748.86
4. Step 4: Simplify right side
   21,155,875.32x = 400,694,589,566,731.38
5. Step 5: Solve for x
   x = 400,694,589,566,731.38/21,155,875.32
6. Step 6: Final answer
   x = 18,940,109.24