Finding the Fourth Proportional to 371,638,426.42, 512,715,875.37 and 212,783,651.02

Step by Step Solution

1. Step 1: Write the proportion equation
   371,638,426.42 : 512,715,875.37 = 212,783,651.02 : x
2. Step 2: Convert to fraction form
   371,638,426.42/512,715,875.37 = 212,783,651.02/x
3. Step 3: Cross multiply
   371,638,426.42x = 512,715,875.37 × 212,783,651.02
4. Step 4: Simplify right side
   371,638,426.42x = 109,097,555,895,862,112
5. Step 5: Solve for x
   x = 109,097,555,895,862,112/371,638,426.42
6. Step 6: Final answer
   x = 293,558,330.19