Finding the Fourth Proportional to 282,938,978.88, 390,455,730.72 and 157,488,469.56

Step by Step Solution

1. Step 1: Write the proportion equation
   282,938,978.88 : 390,455,730.72 = 157,488,469.56 : x
2. Step 2: Convert to fraction form
   282,938,978.88/390,455,730.72 = 157,488,469.56/x
3. Step 3: Cross multiply
   282,938,978.88x = 390,455,730.72 × 157,488,469.56
4. Step 4: Simplify right side
   282,938,978.88x = 61,492,275,462,024,280
5. Step 5: Solve for x
   x = 61,492,275,462,024,280/282,938,978.88
6. Step 6: Final answer
   x = 217,334,054.52