Finding the Fourth Proportional to 389,152,933.89, 537,043,094.72 and 212,948,355.93

Step by Step Solution

1. Step 1: Write the proportion equation
   389,152,933.89 : 537,043,094.72 = 212,948,355.93 : x
2. Step 2: Convert to fraction form
   389,152,933.89/537,043,094.72 = 212,948,355.93/x
3. Step 3: Cross multiply
   389,152,933.89x = 537,043,094.72 × 212,948,355.93
4. Step 4: Simplify right side
   389,152,933.89x = 114,362,444,084,183,280
5. Step 5: Solve for x
   x = 114,362,444,084,183,280/389,152,933.89
6. Step 6: Final answer
   x = 293,875,322.85