Finding the Fourth Proportional to 346,938,196.72, 478,789,730.04 and 207,682,021.48

Step by Step Solution

1. Step 1: Write the proportion equation
   346,938,196.72 : 478,789,730.04 = 207,682,021.48 : x
2. Step 2: Convert to fraction form
   346,938,196.72/478,789,730.04 = 207,682,021.48/x
3. Step 3: Cross multiply
   346,938,196.72x = 478,789,730.04 × 207,682,021.48
4. Step 4: Simplify right side
   346,938,196.72x = 99,436,018,998,570,688
5. Step 5: Solve for x
   x = 99,436,018,998,570,688/346,938,196.72
6. Step 6: Final answer
   x = 286,610,179.96